# Polar Flow vs Treadmill Smart Speed

The clearest difference is rating: Polar Flow at 4.6 against Treadmill Smart Speed's 3.3. Polar Flow also leads on ratings volume (50K vs 24). Treadmill Smart Speed's advantage is monetization model (free vs free with in-app purchases) and update cadence (weekly vs monthly). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Polar Flow sells 1 in-app purchase, starting at $8.99 per month and Treadmill Smart Speed sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Polar Flow holds the better App Store score, 4.6 against 3.3. That said, the two scores are not equally well evidenced: Polar Flow has 50K ratings behind it against 24, so its average is the more settled of the two. Written reviews complicate that: 50% of Polar Flow's written reviews are positive against 53% of Treadmill Smart Speed's, so the app with the better star average is not the one people write more warmly about.

Polar Flow ships an update monthly, Treadmill Smart Speed weekly. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Polar Flow | Treadmill Smart Speed |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (50K ratings)](https://appshunter.io/ios/app/polar-flow/id717172678/reviews)** | [3.3 (24 ratings)](https://appshunter.io/ios/app/treadmill-smart-speed/id1193076459/reviews) |
| Number of ratings | **50K** | 24 |
| Positive reviews | 49.6% of reviews | **53.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 189 MB | 65 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | +4 |
| Developer | [Polar Electro](https://appshunter.io/developer/532468555) | [AppyAppster Ltd](https://appshunter.io/developer/1746049419) |

## What reviewers say

### Polar Flow

[App page](https://appshunter.io/ios/app/polar-flow/id717172678)

This app helps you track daily activity, analyze workouts with detailed metrics, and gain insights into sleep patterns and recovery. It allows for device management, route planning, and seamless syncing with other popular fitness platforms.

**Highlights:** Activity Tracking, Training Analysis, Sleep Insights, Training Load & Recovery, Device & Profile Management, Wireless Syncing, Third-Party Service Integration

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Polar Fitness Program | $8.99 | per month |

**What reviewers like**

- 🚀 Accurate heart rate monitoring
- 🔋 Good battery life
- 👍 Detailed workout data and analysis
- 👍 Intuitive and user-friendly app
- 👍 Seamless syncing with Polar devices

**What reviewers complain about**

- 🐛 Connectivity and syncing issues
- 🐛 Unreliable sleep tracking
- 🐛 Slow GPS initialization
- 👎 Cluttered and confusing app interface
- 👎 Limited customization options

**Reported bugs**

- App crashes during syncing
- Inconsistent data sync between watch and app
- Firmware updates causing loss of user data

**Requested features**

- Ability to manually edit workout data
- Integration with more third-party apps
- More advanced training programs and coaching
- Improved sleep tracking and analysis


### Treadmill Smart Speed

[App page](https://appshunter.io/ios/app/treadmill-smart-speed/id1193076459)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock forever | $9.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- 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

**Requested features**

- 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


## Frequently asked questions

### Is Polar Flow free?

Polar Flow is free to download, with in-app purchases available.

### Is Treadmill Smart Speed free?

Treadmill Smart Speed is free to download, with in-app purchases available.

### Which has better reviews, Polar Flow or Treadmill Smart Speed?

Polar Flow is rated higher. Polar Flow averages 4.6 out of 5 from 50K ratings, while Treadmill Smart Speed averages 3.3 from 24 ratings.

### Do Polar Flow or Treadmill Smart Speed have ads?

Neither Polar Flow nor Treadmill Smart Speed shows ads.

### Which is updated more often, Polar Flow or Treadmill Smart Speed?

Polar Flow ships an update monthly, and Treadmill Smart Speed weekly. Most recently, Polar Flow was updated on October 31, 2026 and Treadmill Smart Speed on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*