Treadmill Smart Speed vs COROS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Treadmill Smart Speed
This app transmits your treadmill running speed from your iPhone or Apple Watch to a receiving device via Bluetooth. It offers multiple input methods, including manual treadmill speed selection, iPhone motion sensing, and Apple Watch data integration for speed, cadence, and heart rate.
- Transmit treadmill speed via Bluetooth
- iPhone motion sensor speed estimation
- Apple Watch speed, cadence, and heart rate transmission
- Manual speed control via crown
- Integrates with iPhone Health App
- Compatible with BLE 4.0 Macs
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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. 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 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
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.
- Daily data tracking (sleep, steps, calories)
- Activity summaries for all sports
- Map and route management
- Device and personal settings customization
- Third-party app integration
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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
Verdict
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 update cadence (every 2 weeks vs every 2 months). On price, review sentiment, ads and monetization model 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
Both are free to download. Treadmill Smart Speed sells 1 one-off in-app purchase. COROS asks for nothing beyond the download.
COROS holds the better App Store score, 4.3 against 3.3. That said, the two scores are not equally well evidenced: COROS has 796 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 53% of Treadmill Smart Speed's written reviews are positive against 54% of COROS's.
Treadmill Smart Speed ships an update every 2 months, COROS every 2 weeks. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.
| Parameter | Treadmill Smart Speed | COROS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (24 ratings) | 4.3 (796 ratings) — better |
| Positive reviews | 52.6% of reviews | 54.3% of reviews — better |
| Number of ratings | 24 | 796 — better |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Requires iOS | 17.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 856 MB |
| Age rating | 4+ | 4+ |
| Developer | AppyAppster Ltd | COROS Wearables Inc. |
Customer experience
Treadmill Smart Speed
COROS
User reviews
Treadmill Smart Speed
From 24 App Store ratingsWhat 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 796 App Store ratingsWhat 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 moreShow fewer
- 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 moreShow fewer
- 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
Treadmill Smart Speed
- Unlock forever$9.99
COROS
No in-app purchases









