Comparison

Treadmill Smart Speed vs COROS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Treadmill Smart Speed

This app transforms your iPhone into a Bluetooth speed and incline sensor for treadmills. It broadcasts your running speed and incline, allowing fitness apps like Zwift to track your performance without additional hardware. An Apple Watch app can also stream heart rate and cadence data.

Highlights
  • Broadcasts speed and incline as Bluetooth sensor
  • Works with Zwift and other fitness apps
  • Apple Watch integration for heart rate and cadence
  • Customizable speed presets
  • Metric/Imperial unit selection
  • Background broadcasting
  • Standalone 'Just Run' mode with 3D park simulation
Features
Read full description

Your treadmill, on Zwift. Treadmill Smart Speed turns your iPhone into a Bluetooth running speed and incline sensor. Set the speed you are running on screen and your iPhone broadcasts it, exactly as a footpod would — so Zwift, and any other app that reads a running sensor, sees your treadmill. No footpod, no treadmill upgrade, no extra hardware. GETTING CONNECTED 1. Start pairing in Zwift. Open the pairing screen and choose the run speed sensor slot. 2. Look for this iPhone by its own name. The app cannot change how it appears — to change what Zwift shows, rename the phone in Settings › General › About › Name. 3. Wait for the pill to turn green. It reads Connected once a fitness app is receiving speed. Until then it reads Discoverable. BUILT TO BE READ MID-RUN The screen is made to be read at arm's length, in a dim room, while you are running. The speed being broadcast owns the display, and every control sits in the half a thumb reaches. • A large speed readout with your current pace beneath it • Plus and minus keys that step in 0.1 increments • Six presets you set to your own paces, one tap each • Incline, sent alongside speed • Metric or imperial, chosen separately for speed and for pace • Keeps broadcasting in the background, so glancing at another app does not drop the connection APPLE WATCH The Apple Watch app estimates your speed and cadence from your wrist and reads your heart rate, then streams them to your iPhone. Your iPhone broadcasts the speed, and your heart rate as a heart-rate sensor that Zwift can pair too. Your run is saved to Health as a workout. JUST RUN No app to send the speed to? Choose Just Run at the bottom of the speed source list and your iPhone records the run on its own. Set the speed to match the treadmill's console and run through a 3D park, as a man or a woman. Every kilometre or mile has a gate: run through it for your split, a tap and a burst of confetti. Each run is kept on your iPhone with its time, distance and pace. Match the distance to the treadmill's display afterwards, and export the run as a TCX file to share or save. The last 50 runs are kept, and you can delete any of them. IF YOU BOUGHT THE ORIGINAL APP It stays yours. Everything in this version is free for you, for ever — no subscription, nothing to restore. It is recognised automatically from your Apple Account, on any of your devices. FREE TO TRY Every feature is free for a 10-minute run, with an hour between free runs. When a free run ends, the speed sent drops to zero, and a Just Run run is saved up to that moment, until you unlock. Unlock forever is a one-time purchase with no subscription. Every run is then unlimited, and the unlock is shared with your family through Family Sharing. The price is shown before you buy. Privacy policy: https://appyappster.com/privacy Support: https://appyappster.com/support

About

COROS

Enhance your fitness journey with detailed daily data, activity summaries, and advanced navigation tools. Customize your devices, download training plans, and seamlessly sync with popular third-party health platforms.

Highlights
  • Daily data tracking (sleep, steps, calories)
  • Activity summaries for all sports
  • Map and route management
  • Device and personal settings customization
  • Third-party app integration
Features
Read full description

The COROS app is your tool to help improve your fitness, download training plans, navigate with confidence, customize your devices, and more. The app will help you to track, and view: - Daily Data such as Sleep, Steps, Calories and more - Activity Summaries for all sports recorded on your watch - The Explore Page to manage maps, routes, and saved locations - Profile Page to customize your watch and personal settings - Connect and sync to 3rd party apps like Apple HealthKit, Google Health Connect, Strava, and more Note: - Sync steps, heart rate and other data to Apple devices using HealthKit - Continuous background use of GPS can decrease battery life

Screenshots

Treadmill Smart Speed4 screens
COROS4 screens

Verdict

The call

The clearest difference is rating: COROS at 4.3 against Treadmill Smart Speed's 3.3. COROS also leads on in-app purchases (none vs 1) and ratings volume (802 vs 24). Treadmill Smart Speed's advantage is update cadence (weekly vs every 3 weeks). On price, review sentiment, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Treadmill Smart Speed sells 1 one-off in-app purchase. COROS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

COROS holds the better App Store score, 4.3 against 3.3. That said, the two scores are not equally well evidenced: COROS has 802 ratings behind it against 24, so its average is the more settled of the two. Written reviews split almost evenly too, at 53% and 54% positive.

UpkeepUpdate frequency

Treadmill Smart Speed ships an update weekly, COROS every 3 weeks. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.

Scorecard6 real differences · 4 level
Treadmill Smart Speed versus COROS: the parameters behind the verdict, then further details
ParameterTreadmill Smart SpeedCOROS
PriceFreeFree
Rating3.3 (24 ratings)4.3 (802 ratings) — better
Positive reviews53.4% of reviews54.3% of reviews — better
Number of ratings24802 — better
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size65 MB873 MB
Age rating4+4+
DeveloperAppyAppster LtdCOROS Wearables Inc.

Customer experience

Treadmill Smart Speed

All ratings24 ratings
Positive58.3%
Neutral4.2%
Negative37.5%
Written reviews58 reviews
Positive53.4%
Neutral3.4%
Negative43.1%

COROS

All ratings802 ratings
Positive80.4%
Neutral6.2%
Negative13.3%
Written reviews784 reviews
Positive54.3%
Neutral13.5%
Negative32.1%

User reviews

Treadmill Smart Speed

From 24 App Store ratings

What we love

  • 👍 Works with Zwift
  • 💰 Affordable alternative
  • 🏃‍♀️ Enables Zwift running
  • ✅ Solves treadmill speed issues
  • 💡 Good for budget-conscious users

Room to improve

  • 🐛 Connection issues
  • 🐛 Speed not detected
  • 🐛 Laggy updates
  • 🐛 Accelerometer mode unreliable
  • 🐛 Disclaimer pops up frequently

COROS

From 802 App Store ratings

What we love

  • 🚀 Excellent battery life
  • 👍 Intuitive and easy to use app
  • 🚀 Quick sync with watch
  • 👍 Detailed data and metrics
  • 👍 Responsive customer service

Room to improve

  • 🐛 Connectivity issues with watch
  • 🐛 Inaccurate heart rate tracking
  • 🐛 Syncing problems with third-party apps
  • 🐛 Buggy after recent updates
  • 🐛 Confusing user interface changes

Bugs and requests

Treadmill Smart Speed

Reported bugs

24 issues
  • Problems reported with Zwift connectivity
  • Doesn't show up on Bluetooth in Zwift
  • Slow response time from armband mode
  • Speed not detected in Zwift
  • Intermittent information transmission
Show 19 more
  • Hefty lag in updating speed on Zwift
  • Accelerometer mode largely useless
  • Disclaimer needs to be tapped away every time
  • Armband doesn't work
  • Does not transfer right speed
  • Connected to Zwift but not working
  • Doesn't connect to Zwift
  • Not working out of a sudden
  • Disconnects every time
  • Bluetooth connectivity with Zwift issue
  • iPhone Speed Sensor doesn't work
  • Apple Watch app says 'not Connected to iPhone'
  • No data transmitted to Zwift
  • Doesn't work
  • No support from link
  • Can't get any feedback on iPhone
  • App did not work
  • Will not pair with Zwift
  • New update won't allow update on iPad Pro

Requested features

7 requests
  • Improve response time for armband mode
  • Allow app to work in background
  • Develop for Zwift bike with Power (Watt)
  • Make app available in more countries
  • Provide instructions for Apple TV connection
Show 2 more
  • Forward other BLE sensors (heart rate, cadence) for Apple TV
  • UI polish

COROS

Reported bugs

5 issues
  • App crashes frequently
  • Inability to log in or sync data
  • Inconsistent data between watch and app
  • Elevation/GPS tracking issues
  • Strength training mode not working properly

Requested features

5 requests
  • Add more watch face options
  • Improve sleep tracking accuracy
  • Integrate with Apple Health app
  • Add ability to edit/delete activities
  • Provide more customization options

In-app purchases

1 purchases

Treadmill Smart Speed

One-time1
  • Unlock forever$9.99
None

COROS

No in-app purchases

Questions

Is Treadmill Smart Speed free?
Treadmill Smart Speed is free to download, with in-app purchases available.
Is COROS free?
COROS is free to download, with no in-app purchases.
Which has better reviews, Treadmill Smart Speed or COROS?
COROS is rated higher. Treadmill Smart Speed averages 3.3 out of 5 from 24 ratings, while COROS averages 4.3 from 802 ratings.
Do Treadmill Smart Speed or COROS have ads?
Neither Treadmill Smart Speed nor COROS shows ads.
Which is updated more often, Treadmill Smart Speed or COROS?
Treadmill Smart Speed ships an update weekly, and COROS every 3 weeks. Most recently, Treadmill Smart Speed was updated on November 6, 2026 and COROS on November 9, 2026.

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