# Polar Flow vs Fitrockr Sync

The clearest difference is in-app purchases: Fitrockr Sync at none against Polar Flow's 1. Fitrockr Sync also leads on update cadence (weekly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Polar Flow sells 1 in-app purchase, starting at $8.99 per month. Fitrockr Sync asks for nothing beyond the download.

Polar Flow ships an update monthly, Fitrockr Sync weekly. The most recent releases landed on November 10, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Polar Flow | Fitrockr Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (50K ratings)](https://appshunter.io/ios/app/polar-flow/id717172678/reviews)** | — |
| Number of ratings | **50K** | — |
| Positive reviews | 49.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Freemium | — |
| Size | 191 MB | 52 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Polar Electro](https://appshunter.io/developer/532468555) | [Digital Rebels GmbH](https://appshunter.io/developer/1355346712) |

## What reviewers say

### Polar Flow

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

This app helps you track your daily activity, analyze workouts with detailed data, and gain insights into your sleep and recovery. It integrates with Polar devices and other fitness services to provide personalized guidance for your health and fitness journey.

**Highlights:** Activity Tracking (steps, calories, distance), Detailed Training Analysis (heart rate, pace, power), Advanced Sleep Insights, Training Load & Recovery Recommendations, Device and Sports Profile Management, Wireless Syncing with Polar Devices, Integration with Strava, TrainingPeaks, and more

**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


### Fitrockr Sync

[App page](https://appshunter.io/ios/app/fitrockr-sync/id6480404044)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Polar Flow free?

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

### Is Fitrockr Sync free?

Fitrockr Sync is free to download, with no in-app purchases.

### Do Polar Flow or Fitrockr Sync have ads?

Neither Polar Flow nor Fitrockr Sync shows ads.

### Which is updated more often, Polar Flow or Fitrockr Sync?

Polar Flow ships an update monthly, and Fitrockr Sync weekly. Most recently, Polar Flow was updated on November 10, 2026 and Fitrockr Sync on November 4, 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.*