KingSmith is the company; WalkingPad is its brand. Search for either name and you land on the same machines, often sold on two official websites, kingsmith.com and walkingpad.com, which do not always list the same figures. KingSmith says WalkingPad began as a lab project by four graduate students, that it holds the global "WalkingPad" trademark, and that it launched the A1, which it calls the first foldable walking pad. That history explains the brand's main strength: five of the six models we cover fold in half. For how WalkingPad compares with every other brand, see our best walking pads guide.
This page covers the six KingSmith models we can match to current amazon.com listings, explains what the model names mean, and says which one fits which buyer.
Which KingSmith WalkingPad should you buy?
- Best for most people: WalkingPad Z1, folds in half, a 47.6-inch belt and a slim 4.1-inch profile.
- Smallest folded footprint: WalkingPad C2, folds to about 32 x 20 inches.
- Highest weight rating that folds in half: WalkingPad R3, 265 lb and a 17.3-inch belt.
- Best wide-belt folding pad: WalkingPad P1, a 16.5-inch belt and four ways to control speed.
- Best with a handrail: WalkingPad Z1R, a removable handrail and up to 5 mph.
- Best for walking and running: WalkingPad R2, up to 7.5 mph with the handrail up.
KingSmith WalkingPad models compared
Every model here is a walking-speed pad except the R2, and none has an incline. The A1 Pro and R1 Pro, which we covered earlier, are explained in their own sections below.
Scroll sideways for all specs →
| Product | Motor | Speed | Max user | Belt | Weight | Folds | Handle | App | Where to buy |
|---|---|---|---|---|---|---|---|---|---|
1  WalkingPad Z1Most people | Brushless | 1-4 mph | 242 lb | 47.6 x 15.7 | 51 lb | ✓ Yesfolds in half | ✕ No | KS Fit | Check price on Amazon |
2  WalkingPad C2Small apartments | 1 HP brushless | 0.5-3.7 mph | 220 lb | 47.2 x 15.8 | 55 lb | ✓ Yesfolds in half | + Optional | KS Fit | Check price on Amazon |
3  WalkingPad R3Highest rating, folds in half | 3.0 HP brushless | 1-4 mph | 265 lb | 47.2 x 17.3 | 66.3 lb | ✓ Yesfolds in half | ✕ No | Yes, KS Fit | Check price on Amazon |
4  WalkingPad P1Wider belt | Brushed, 746 W input | 0.3-3.75 mph | 220 lb | 47.24 x 16.5 | 62 lb | ✓ Yesfolds in half (180°) | ✕ No | KS Fit | Check price on Amazon |
5  WalkingPad Z1RHandrail | 2.25 HP brushless | 1-5 mph | 242 lb | 47.6 x 15.7 | 57.7 lb | Handrail folds down flat | ✓ Yesremovable handrail | KS Fit | Check price on Amazon |
6  WalkingPad R2Walk and run | 3.75 HP brushless | Walking mode 0.5-6 km/h | 240 lb | 47 x 17 | 81 lb | ✓ Yesfolds in half and stands… | ✓ Yeshandrail raises for… | Yes, KS Fit | Check price on Amazon |
Figures are as published by the maker unless the product section below says otherwise. Hover or tap a cell for the full note. We link to the live price instead of printing one, because prices change daily.
WalkingPad model names explained
KingSmith does not publish a key to its model letters, so read them as family names rather than codes. Here is what the product pages and KingSmith's own timeline show:
- A series (A1 Pro): descends from the A1, which KingSmith calls the first foldable walking pad and which won iF and Red Dot design awards in 2014. The A1 Pro was sold in 230 lb and 300 lb versions under the same name, and its Amazon listing was no longer live when we checked on October 29, 2026.
- R series (R1 Pro): descends from the R1, which KingSmith calls the first foldable treadmill. It is the running-capable line, with a handrail that raises for faster speeds.
- C and P series (C2, P1): fold-in-half walking pads with foot-sensing speed control. The P1 uses an older brushed motor; the C2 is brushless.
- Z series (Z1, Z1R): the newest pads. Despite the shared name, the Z1R is not simply a Z1 with a rail: its deck does not fold in half, and it folds to 49.2 inches long against 31.8 inches for the Z1.
Model names on Amazon add another layer. Several models, including the P1 and A1 Pro, have more than one amazon.com listing, some older than others. Check the weight rating and speed in the listing title before you buy.
The 6 KingSmith WalkingPads to consider, in detail
1. WalkingPad Z1: best for most people
Why we picked it: The Z1 does the classic WalkingPad trick, folding in half to 31.8 x 22 x 5.4 inches, while fixing two weak points of older models: it reaches 4 mph instead of 3.7 or 3.75, and it is rated for 242 pounds instead of 220. Its 47.6 x 15.7-inch belt is among the longest in the range, and at 4.1 inches tall unfolded it is the slimmest WalkingPad here, which helps under a desk. It ships assembled, uses EVA and PET shock absorption, and weighs 51 pounds. The one messy spec is the motor: it is brushless, but kingsmith.com lists 0.75 HP, walkingpad.com 2.25 HP and hometreadmill.co.uk 1.25 HP. kingsmith.com also lists it as sold out while walkingpad.com still sells it. Our WalkingPad Z1 review has more.
Key specs:
- Motor: brushless; 0.75 HP (kingsmith.com) or 2.25 HP (walkingpad.com)
- Speed: 1 to 4 mph
- Max user weight: 242 lb (walkingpad.com); 243 lb (kingsmith.com)
- Belt: 47.6 x 15.7 in
- Weight and size: 51 lb; 56.1 x 22 x 4.1 in unfolded; 31.8 x 22 x 5.4 in folded
- Warranty: 1 year (walkingpad.com)
Pros
- Folds in half
- Long belt
- Very slim
- Faster and higher-rated than the C2 and P1
Cons
- No handle or incline
- 242-pound limit
- Motor rating differs between KingSmith's own sites
Who should skip it: anyone over 242 pounds, anyone who wants a handrail, and anyone who wants a minimum speed below 1 mph for very slow walking.
What owners report: WalkingPad Z1
Our summary, in our own words, of 20 verified-purchase Amazon reviews we read on 30 October 2026 (the listing then showed 213 positive and 58 critical verified reviews). This is not our own testing.
What they like
- Folds small and tucks under a desk
- Work-from-home owners report big step gains, one from about 3,000 to 10,000 a day
- Stays cool over 45 to 60 minutes; WalkingPad replaced faulty units without argument
Common complaints
- 4 of the 10 critical reviews we read describe the belt drifting or slipping, sometimes within days
- A few say speed changes in 0.5 mph steps feel abrupt
- No step count, and it needs the remote or app to run
2. WalkingPad C2: smallest folded footprint
Why we picked it: The C2 folds 180 degrees to about 32 x 20 x 5.5 inches, the narrowest folded size here, so it can stand in a closet or slide under most beds. Unfolded, it still has a 47.2 x 15.8-inch belt and a brushless 1 HP motor (KingSmith figures). It arrives assembled and has a foot-sensing mode that speeds up as you move toward the front of the belt and slows as you drift back, plus a remote and the KS Fit app. Tom's Guide found the app glitchy and noted that unfolding it takes some force. Tom's Guide also lists different figures from KingSmith (62 lb, a 47 x 16.5-inch belt and 0.3 to 3.7 mph); we use the brand figures. Our WalkingPad C2 review goes further.
Key specs:
- Motor: 1 HP, brushless (brand figure)
- Speed: 0.5 to 3.7 mph
- Max user weight: 220 lb
- Belt: 47.2 x 15.8 in
- Weight and size: 55 lb; 57 x 20 x 5 in unfolded; 32 x 20 x 5.5 in folded
- Noise: 65 dB (KingSmith figure)
Pros
- Narrow folded size
- Long belt
- Brushless motor
- No assembly
Cons
- 220-pound limit
- 3.7 mph top speed
- Handle sold separately
- Warranty not stated on the product page
Who should skip it: heavier users, anyone who wants to walk faster than 3.7 mph, and anyone who will leave the pad out all the time and so gains nothing from the fold.
What owners report: WalkingPad C2
Our summary, in our own words, of 20 verified-purchase Amazon reviews we read on 30 October 2026 (the listing then showed 83 positive and 19 critical verified reviews). This is not our own testing.
What they like
- Folds in half and stows under a desk
- Owners use it for hours at a standing desk; one reports 1,000 miles
- KingSmith support gets praise
Common complaints
- 3 of the 10 critical reviews we read say it is louder than expected, with noise at the fold joint
- Several dislike needing the app to unlock features, and some raise data and privacy concerns
- A few report a sticking or dead remote and an unreliable automatic speed mode
3. WalkingPad R3: highest weight rating that still folds in half
Why we picked it: This slot used to go to the 300 lb version of the A1 Pro. The A1 Pro's Amazon listing was no longer live when we checked on October 29, 2026, and walkingpad.com had already shown the 300 lb version as sold out, so we now point heavier walkers who want a fold-in-half pad to the R3. WalkingPad's product page lists the R3 at both 330 lb and 265 lb, while its comparison chart, FAQ and the Amazon title say 265 lb, so plan around 265 lb. That is still the highest figure among current fold-in-half WalkingPads. The R3 also has a wide 47.2 x 17.3-inch belt, folds to 33.5 x 26.5 x 7.5 inches and weighs 66.3 pounds. Our WalkingPad R3 review covers the R3 Hybrid+ version with handrails as well. If you already own an A1 Pro, our WalkingPad A1 Pro review still covers it.
Key specs:
- Motor: 3.0 HP brushless (walkingpad.com); 1.0 HP, 735 W rated per ocdevel, citing the manual
- Speed: 1 to 4 mph (WalkingPad also gives 6 km/h, which is 3.7 mph)
- Max user weight: 265 lb (the product page also shows 330 lb)
- Belt: 47.2 x 17.3 in
- Weight and size: 66.3 lb; 57.8 x 26.5 x 6.1 in unfolded; 33.5 x 26.5 x 7.5 in folded
- Warranty: 1 year, optional extension (walkingpad.com)
Pros
- Highest current fold-in-half rating at 265 lb
- Widest belt among the pure walking pads here
- KS Fit app
Cons
- Premium price tier
- Two weight figures on one page
- 6.1 inches tall, so it adds more desk height than the Z1
Who should skip it: anyone over about 235 pounds who wants a comfortable margin (see our walking pads for heavier people), and anyone who needs a handrail or wants to jog.
4. WalkingPad P1: best wide-belt folding pad
Why we picked it: The P1 is an older design, but it still has a 16.5-inch-wide belt, wider than the Z1, Z1R and C2, and four ways to control speed: FootSense, the panel, the remote and the KS Fit app. It folds in half to 32.5 x 21.5 x 5 inches and has 12-step speed control and a 4-layer belt. The drawbacks come from its age. It uses a brushed motor (KingSmith lists 746 W input rather than horsepower), it is rated for 220 pounds, and it weighs 62 pounds. Sources differ on the minimum speed: 0.3 mph on walkingpad.com and 0.5 mph on kingsmith.com. There are several amazon.com P1 listings, old and new, so buy from the one in stock. Our WalkingPad P1 review covers it in detail.
Key specs:
- Motor: brushed, 746 W input (brand figure)
- Speed: 0.3 to 3.75 mph (walkingpad.com); 0.5 mph minimum on kingsmith.com
- Max user weight: 220 lb
- Belt: 47.24 x 16.5 in
- Weight and size: 62 lb; 56.37 x 21.5 x 5 in unfolded; 32.5 x 21.5 x 5 in folded
- Warranty: 1 year, optional extension (walkingpad.com)
Pros
- Wide belt for a folding pad
- Many speed controls
- Very slow minimum speed
Cons
- Older brushed motor
- 220-pound limit
- Heavier than the Z1
Who should skip it: anyone over 220 pounds, and buyers who want the newest motor technology for long daily use.
5. WalkingPad Z1R: best with a handrail
Why we picked it: The Z1R adds a removable handrail, which many buyers want for balance while reading or taking calls. It also reaches 5 mph, faster than any other pure walking pad in the range, and KingSmith lists a 2.25 HP brushless motor, EVA and PET cushioning, Apple Watch support through KS Fit and Bluetooth pairing with Kinomap. It keeps the 47.6 x 15.7-inch belt and 242-pound rating of the Z1. The trade-off is storage. The handrail folds flat, but the deck does not fold in half, so it folds to 49.2 x 23.2 x 5.5 inches rather than about 32 inches. walkingpad.com offers 30-day returns and a 1-year warranty with an optional extension. For other options, see our best walking pads with a handle.
Key specs:
- Motor: 2.25 HP, brushless (brand figure)
- Speed: 1 to 5 mph
- Max user weight: 242 lb
- Belt: 47.6 x 15.7 in
- Weight and size: 57.7 lb; 55.9 x 23.2 x 37.9 in unfolded; 49.2 x 23.2 x 5.5 in folded
- Warranty: 1 year, optional extension (walkingpad.com)
Pros
- Removable handrail
- Up to 5 mph
- Long belt
Cons
- Does not fold in half
- Narrow 15.7-inch belt
- 242-pound limit
Who should skip it: anyone who needs a pad that folds small, and anyone over 242 pounds.
What owners report: WalkingPad Z1R
Our summary, in our own words, of 20 verified-purchase Amazon reviews we read on 30 October 2026 (the listing then showed 156 positive and 19 critical verified reviews). This is not our own testing.
What they like
- Folds easily and runs quietly
- Light, with little assembly
Common complaints
- Wheels do not roll on carpet
- One recent owner reports the belt drifting and fraying
- Many reviews on this listing describe an earlier WalkingPad model, so treat the overall rating with care
6. WalkingPad R2: best for walking and running
Why we picked it: The R1 Pro held this slot until its Amazon listing went dead; it was no longer live when we checked on October 29, 2026. The R2 is the current WalkingPad 2-in-1 in the same R series: walking mode runs to about 3.7 mph with the handrail down, and running mode reaches 12 km/h (7.5 mph) with the handrail up, which is faster than the R1 Pro's 10 km/h. It has a 47 x 17-inch belt, the KS Fit app, and it folds in half to 39 x 28 x 6 inches and can stand upright. It is heavy at 81 pounds. WalkingPad gives its weight limit as 240, 242 and 243 pounds on different pages, so plan around 240. Our WalkingPad R2 review has the full detail, and our WalkingPad R1 Pro review still covers the older model.
Key specs:
- Motor: 3.75 HP brushless (walkingpad.com); independent reviews give 1.25 HP
- Speed: about 0.5 to 3.7 mph walking (handrail down); up to 7.5 mph running (handrail up)
- Max user weight: 240 lb (plan figure; 242 and 243 lb also published)
- Belt: 47 x 17 in (comparison chart: 47.2 x 17.3 in)
- Weight and size: 81 lb; 57 x 28 x 40.5 in with the handrail up; 39 x 28 x 6 in folded
- Handle: handrail raises for running, lowers for walking
Pros
- Runs to 7.5 mph
- Wide 17-inch belt
- Folds in half and stands upright
- Handrail included
Cons
- Premium price
- Heavy at 81 pounds
- 240-pound limit
- Motor figures disagree between WalkingPad and independent reviews
Who should skip it: anyone over about 210 pounds who wants a margin, anyone who needs to lift the pad often, and serious runners, who will want a full treadmill.
What owners report: WalkingPad R2
Our summary, in our own words, of 20 verified-purchase Amazon reviews we read on 30 October 2026 (the listing then showed 105 positive and 44 critical verified reviews). This is not our own testing.
What they like
- Folds in half and slides under a bed or couch
- Sturdy, fairly quiet and used for both desk walking and runs
- A 230 lb walker reports no belt slip
Common complaints
- Several find it hard to fold and move because of small wheels
- A few report the rail knob or fold mechanism failing over time
- Some squeaking and remote failures; many reviews date from 2020 and 2021
WalkingPad Z3: the 2026 Z series update
Verdict in short
- Buy the Z3 Just Walk if you want a fold-in-half pad for walking at a standing desk. It reaches 4 mph, has no handrail to get in the way of a desk, and is the lightest Z3.
- Buy the Z3 Hybrid or Hybrid+ only if you also want to jog. Both reach 6.5 mph with a handrail, but they are heavier and wider, and the Hybrid+ is the most expensive of the three.
- Skip the Z3 if you weigh more than 242 lb, want a belt wider than 15.7 inches, or want incline. The WalkingPad R3 is wider and rated for more weight.
WalkingPad Z3 specs, version by version
These figures come from WalkingPad's product pages and its model comparison chart, checked in October 2026. Where two WalkingPad pages give different figures, both are shown.
| Spec | Z3 Just Walk | Z3 Hybrid | Z3 Hybrid+ |
|---|---|---|---|
| Speed | 1 to 4 mph (6 km/h) | 1 to 6.5 mph (10 km/h) | 1 to 6.5 mph (10 km/h) |
| Handrail | None | Yes (type not described) | Foldable side handrails, adjustable height |
| Walking area | 47.6 x 15.7 in (product page); 47.2 x 15.7 in (comparison chart) | 47.2 x 15.7 in | 47.2 x 15.7 in |
| Max user weight | 242 lb (110 kg) | 242 lb (110 kg) | 242 lb (110 kg) |
| Motor (maker figure) | 3.0 HP brushless | 3 HP brushless | 3.0 HP brushless |
| Net weight | 67.2 lb (product page); 76.9 lb (comparison chart) | 84 lb | 88.2 lb |
| Unfolded size | 57.9 x 23.7 x 6.2 in | 57.9 x 27.8 x 40.5 in | 57.9 x 30.1 x 40.5 in |
| Folded size | 33.6 x 23.7 x 7.6 in (comparison chart) | 39.7 x 27.8 x 7.6 in | 39.7 x 30.1 x 7.6 in |
| Speed control | KS Fit app, remote | KS Fit app, remote | KS Fit app, remote |
| Noise (maker claim) | "As quietly as a normal conversation", no dB figure | Not published | Under 65 dB |
| Incline | None listed | None listed | None listed |
| Warranty | 1 year, optional extension | 1 year, optional extension | 1 year, optional extension |
Scroll sideways for all specs →
| Product | Speed | Max user | Belt | Weight | Folds | Handle | Price tier | Where to buy |
|---|---|---|---|---|---|---|---|---|
1  WalkingPad Z3 Just WalkWalk only, lightest | 1-4 mph | 242 lb | 47.6 x 15.7 | 67.2 lb net | ✓ Yesfolds in half | ✕ No | Mid-range tier | Check price on Amazon |
2 WalkingPad Z3 Hybrid+Walk and jog, side handrails | 1-6.5 mph | 242 lb | 47.2 x 15.7 | 88.2 lb | ✓ Yeshandrails fold down | ✓ Yesfoldable side handrails… | Premium tier | Check price on Amazon |
3 WalkingPad Z1Older Z, folds in half | 1-4 mph | 242 lb | 47.6 x 15.7 | 51 lb | ✓ Yesfolds in half | ✕ No | Mid-range tier | Check price on Amazon |
4 WalkingPad C2Smallest fold | 0.5-3.7 mph | 220 lb | 47.2 x 15.8 | 55 lb | ✓ Yesfolds in half | + Optional | Mid-range tier | Check price on Amazon |
Figures are as published by the maker unless the product section below says otherwise. Hover or tap a cell for the full note. We link to the live price instead of printing one, because prices change daily.
Z3 Just Walk vs Hybrid vs Hybrid+: what the names mean
KingSmith reuses the same names across its 2026 lines, so it helps to read them as labels for a job rather than for trim levels.
Z3 Just Walk
"Just Walk" means a flat walking pad with no handrail and a 4 mph top speed. It is the version for walking at a standing desk or a treadmill desk. WalkingPad's Z-series page says it has big wheels and an improved screen compared with older Z models. It is the narrowest Z3 at 23.7 inches wide and the lightest, though WalkingPad's own pages disagree on its weight: the product page gives 67.2 lb net and 76.9 lb gross, while the comparison chart lists 76.9 lb as the net figure.
Z3 Hybrid
"Hybrid" in WalkingPad's naming means a walking and jogging machine with a handrail you can lower for walking and raise for jogging. The brand's Hybrid series FAQ describes it that way. The Z3 Hybrid reaches 6.5 mph. WalkingPad's chart says it has a handrail but does not describe its shape, and its 27.8-inch width sits between the Just Walk and the Hybrid+. We could not find a full spec page for this version, so details beyond the chart are not published.
Z3 Hybrid+
The "plus" adds foldable side handrails with adjustable height, which WalkingPad positions as extra stability. Everything else on the spec sheet matches the Hybrid except width (30.1 inches) and weight (88.2 lb net). It is the only Z3 with a published noise figure (under 65 dB) and the only one whose box list includes a separate handle and safety key.
On Amazon: the names get blurrier. When we checked on October 29, 2026, the Z3 listing our buttons point to (ASIN B0H6ZXB9C5) was titled "WalkingPad Z3 Foldable Walking Pad", with model number WP400F42 and a 242 lb maximum weight, and it was in stock. A listing we found earlier, titled "Walk and Jog", no longer opened, and we did not find a Hybrid or Hybrid+ listing that names its version. Match the speed (4 or 6.5 mph) and the handrail description to the table above before you buy.
WalkingPad X25: a folding running treadmill
The X25 is not a walking pad but a double-fold home treadmill with a 51.9 x 19.6-inch belt and a 10 mph top speed.
Key specs
Figures are from KingSmith.com and WalkingPad.com unless noted. Where the two maker sites differ, both figures are shown.
| Spec | WalkingPad X25 |
|---|---|
| Model | X25 (Abt lists TRX25F) |
| Motor | Brushless, 1.5 HP (KingSmith.com, Abt); 4.5 HP (WalkingPad.com) |
| Speed | 1 to 10 mph |
| Incline | None listed |
| Max user weight | 300 lb |
| Running area | 51.9 x 19.6 in |
| Unfolded size | 60.8 x 30.4 x 40.3 in |
| Folded size | 10.1 x 30.4 x 40.3 in |
| Weight | 104 lb net, 119 lb shipping |
| Handlebar | Upright console bar, not adjustable; no side rails |
| Speed control | SpeedDial knob or KS Fit app |
| Remote | No |
| App | KS Fit, Bluetooth, Apple Watch support |
| Cushioning | EVA and PET layers |
| Assembly | Fully assembled |
| Warranty | 1 year (Abt: 1-year limited on parts, frame, motor and deck) |
WalkingPad X25 vs X25+
KingSmith sells two versions, and retailers sometimes mix the names. According to WalkingPad.com, both have the same 1 to 10 mph range, 300 lb limit and 51.9 by 19.6 inch running area. The differences are:
- Side handrails. The X25+ adds foldable side handrails. The standard X25 has only the front console bar.
- Weight. WalkingPad.com lists the X25+ at 119 lb, against 104 lb net for the X25.
- Display. The X25+ page describes a light bar that shows progress in real time.
If you want something to hold on both sides, the X25+ is the version to find. Otherwise, the standard X25 is lighter to move.
Who the X25 foldable home running treadmill suits
- Runners short on space. A 10 mph top speed allows a 6-minute mile, which most walking pads and the 7.5 mph X21 cannot reach. TreadmillReviews.com named outdoor runners who need an occasional indoor backup as a good fit.
- Heavier users. The 300 lb rating is 60 lb higher than the X21 and the Denise Austin models. Our best walking pads for heavy people list covers other options at that level.
- Renters and apartment dwellers. Treadmill Review Guru's Sydney Kaiser named apartment living and portability as the X25's strengths.
- Walkers with a longer stride. At about 52 inches, the running area is longer than most folding pads, which TreadmillReviews.com saw as a plus for walkers.
It is not a desk walker. The upright console bar stands about 40 inches high in front of you, so it will not slide under a desk.
The KS Fit app for WalkingPad
Most current WalkingPad models connect to KingSmith's KS Fit app. Here is what it does, how to set it up and how to fix the common problems.
What is the KS Fit app?
| Detail | What the listings say |
|---|---|
| Developer | Beijing King Smith Technology Co., Ltd. (北京金史密斯科技股份有限公司) |
| Cost | Free. WalkingPad's FAQ: "The KS Fit app is free." |
| iPhone | iOS 13.0 or later. The App Store also lists Apple Watch (watchOS 9.0 or later). |
| Android | Google Play, 500K+ downloads, last updated August 19, 2026 when we checked |
| Ratings when we checked | 2.9 stars from about 2,000 reviews on Google Play; 3.1 from 42 ratings on the US App Store |
| Age rating | 3+ on Google Play, 4+ on the App Store |
Both store listings describe the same core features: manual, automatic and target modes; a home training plan module where you build and combine your own plans; and records of training time, frequency and calories with weekly, monthly, yearly and all-time views. Both also list rankings and a "product encyclopedia".
Which walking pads use KS Fit?
KS Fit works with KingSmith's WalkingPad range. WalkingPad's FAQ names the P1 and C1 directly ("WalkingPad P1/C1 works with KS Fit app and a display remote control"). It also warns that "app compatibility varies by model and app version" and tells buyers to check each product page. Our reviews of every WalkingPad model list KS Fit support:
- Fold-in-half walking pads: C2, Z1 and Z1R, P1, A1 Pro, and the newer Z3 and R3.
- 2-in-1 and folding treadmills: R2, R1 Pro, X21, X25 and the Denise Austin editions.
Some models add other connections. KingSmith lists NFC quick-connect to KS Fit on the X21, and our KingSmith round-up notes that the Z1R also pairs with Kinomap. For the full model line-up, see our KingSmith WalkingPad review.
There is also a separate iPhone app called KS Lite. MWM's app directory describes it as "formerly KS Fit Lite", a slimmer recording-focused app from a different listed developer. Unless your manual tells you otherwise, KS Fit is the app WalkingPad's own guides refer to.
How to set up KS Fit with a WalkingPad
These steps follow WalkingPad's July 2, 2026 KS Fit article and its FAQ:
- Install KS Fit from the App Store or Google Play. Check that the developer is Beijing King Smith Technology so you do not install a lookalike.
- Allow the permissions it asks for on first launch. WalkingPad mentions notification and device search permissions, which the app uses to find your pad.
- Set your country first. WalkingPad's FAQ says to change the country to yours on the app's home screen before you register. Sign-up by phone number is offered only to users in China, so US owners register with an email address.
- Restart the walking pad so it is in pairing mode. WalkingPad says this speeds up the search.
- Tap Add Device on the home screen and select your pad when it appears.
- Finish the beginner guide if the app offers one (see the next section).
The remote is paired separately from the app. The WPS1F manual says to restart the pad, then press and hold the remote's mode button until it beeps. If your remote stops responding, see walking pad remote not working.
The speed unlock: why a new WalkingPad feels slow
Many new owners find their WalkingPad will not go above a slow walk. That is by design on some models.
- The KingSmith WPS1F manual says that until you complete the "novice guide" in KS Fit, "the speed limit stays at 3 km/h (1.9 mi/h)." It gives a second way to unlock: walk 1 km on the pad, then restart it.
- Tom's Guide found the same behavior on the A1 Pro in December 2021. The pad started at 2.5 km/h (just over 1.5 mph), and faster speeds unlocked only after about 1 km of walking, which took the reviewer around 25 minutes.
So you do not have to keep the app to get full speed. Either finish the in-app guide once, or walk the first kilometer and restart. Check your own model's manual, because the unlock speed and distance can differ between models.
Does KS Fit sync with Apple Health, Google Fit or Strava?
- Apple Health: yes, according to the App Store listing. Turn on sharing in KS Fit's Data Sharing settings. The listing also says to set KS Fit as the first data source under Steps in the Apple Health app.
- Google Fit: WalkingPad's July 2026 article says KS Fit syncs with Google Fit and Apple Health. The Google Play listing itself does not mention Google Fit or Health Connect, and one Play reviewer called Google Health sync "a little flakey".
- Apple Watch: the App Store lists a watchOS app, and our Z3 and Denise Austin reviews note WalkingPad's claim of Apple Watch support through KS Fit.
- Strava: we found no mention of Strava in the store listings, WalkingPad's FAQ or its KS Fit article. Do not count on it.
WalkingPad's FAQ adds a general caution that "support for Apple Health, other health platforms, Bluetooth features, and data syncing may vary."
Common KS Fit problems and fixes
The app will not find the pad
Restart the pad so it is in pairing mode, keep your phone close, and make sure Bluetooth and the permissions you were asked for are on. Close any other fitness app that might already be connected to the pad.
Walks are missing or did not sync
This is the most common complaint. Tom's Guide reported in its A1 Pro review that walks often went unrecorded. It also noted that the Google Play rating at the time was 1.4 stars, with users reporting sync problems and dropped connections. Keep the app open and the phone near the pad for the whole session, update the app, and log the session by hand if it matters to you.
Units do not match the pad
Tom's Guide found the A1 Pro showed miles and mph while the app showed kilometers and km/h, and it was not clear how to change the units. Look for a units option in the app's settings after updating. Otherwise, convert using 1 mph = 1.6 km/h.
The pad will not go faster than about 1.9 mph
Finish the in-app beginner guide, or walk 1 km and restart the pad, as described above.
Wi-Fi models will not connect
WalkingPad's FAQ covers devices whose Wi-Fi light flashes fast and will not connect. It gives a button sequence to reset the pad's Wi-Fi and reconnect. Follow the steps for your model in that FAQ.
How to choose between WalkingPad models
Weight rating first
KingSmith's current ratings sit in three bands: 220 pounds (C2, P1), 240 to 243 pounds (Z1, Z1R, R2) and 265 pounds (R3). Choose a model rated at least 30 pounds above your weight. If you are over about 235 pounds, no current fold-in-half WalkingPad gives that margin, and a 400-pound pad from Merach is the better fit. Our walking pad weight limit guide explains the reasoning.
Fold in half, or fold flat
Five of the six models fold in half. The Z1R is the exception. Work out the floor area you have for storage: the C2 folds to about 640 square inches (32 x 20), the Z1 to about 700 (31.8 x 22), the P1 to about 699 (32.5 x 21.5), the R3 to about 888 (33.5 x 26.5) and the R2 to about 1,092 (39 x 28). The Z1R needs about 1,141 square inches (49.2 x 23.2), almost twice the C2. If your pad will live under a desk permanently, folding matters less and the Z1R's handrail may be worth more.
Belt width and speed
Belt widths run from 15.7 inches (Z1, Z1R) to 17.3 inches (R3). If you drift sideways while typing, the P1 (16.5 inches), the R2 (17 inches) and the R3 (17.3 inches) give you more room. For speed, the C2 and P1 top out at 3.7 to 3.75 mph, the Z1 and R3 at 4 mph, the Z1R at 5 mph and the R2 at 7.5 mph with its handrail up. Most people walk at 1.5 to 2.5 mph while working, so speed only matters if you want brisk walks or jogging. Our walking pad speed guide has typical paces.
Motor type and control
All current models are brushless except the P1, which uses a brushed motor. Brushless motors generally need less maintenance. Most WalkingPads also offer foot sensing (FootSense), which adjusts speed by where you stand on the belt. It is handy for short walks. At a desk, where you may lean toward the screen, a fixed speed set by remote can be simpler, and every model has a remote.
Desk height
The Z1 adds about 4.1 inches to your standing height, the C2 and P1 about 5 inches, and the R3 about 6.1 inches. Raise your standing desk by the same amount when you walk.
What to know about KingSmith
The company: KingSmith sells WalkingPad through kingsmith.com and walkingpad.com. On its about page it claims 264 patents and more than 1.7 million units sold, a self-owned factory completed in 2018, and a patented auto speed control called FootSense. It also lists design awards for the A1 and X21, and USA Today CES Top Pick awards in 2025 and 2026 (WalkingPad about page). These are the brand's own claims.
App: all six models use the KS Fit app on iOS and Android. Several models support Apple Watch through KS Fit, and the Z1R pairs with Kinomap. Tom's Guide found the app glitchy on the C2, so rely on the remote for daily use.
Warranty and returns: walkingpad.com's policy gives 30 days from delivery to return a product and "a one-year guarantee". In the first 30 days, returns and repairs are free; from 30 days to one year, you pay to ship the pad to the maintenance center and repairs and return shipping are free (WalkingPad refund policy). Product pages for the Z1R, P1, R2 and R3 mention an optional extension. The C2 product page we checked does not state a warranty, so confirm the terms if you buy from another seller.
Support: walkingpad.com lists contact@walkingpad.com and +1 781-809-1779.
Safety record: we found no CPSC recall or warning naming a WalkingPad or KingSmith product as of September 2026. For the one 2026 walking pad warning, see our Sperax walking pad warning page.
WalkingPad vs rivals
WalkingPad vs UREVO: WalkingPad wins on storage, because most models fold in half, and on belt length at about 47 inches. UREVO wins on incline, which no WalkingPad here has. Our UREVO vs WalkingPad comparison and UREVO walking pad review go through the details.
WalkingPad vs Merach: Merach's W50 and W60 are rated for 400 pounds with a 12% motorized incline, but they are heavy and do not fold. If you are heavier or want incline, Merach fits better; if you need to put the pad away every evening, WalkingPad does. See our Merach walking pad review.
WalkingPad vs budget brands: DeerRun, Yagud and similar brands cost less, but DeerRun's pads have belts of about 35 inches and Yagud rarely publishes belt size at all. For the best folding options across all brands, see our best foldable walking pads.
How we researched this review
We compared KingSmith's product pages on kingsmith.com and walkingpad.com, its about page and refund policy, Amazon listing data, and independent coverage from Tom's Guide and hometreadmill.co.uk, plus the CPSC recall database. Where KingSmith's two sites disagree, we show both figures. We did not test these pads in person, and we update this page when KingSmith changes its range. Read more about how we research.