# Polar Flow vs Syncro

The clearest difference is rating: Polar Flow at 4.6 against Syncro's 4.0. Polar Flow also leads on ratings volume (50K vs 4). Syncro's advantage is in-app purchases (none vs 1). On price, review sentiment, update cadence and ads there is nothing between them.

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

Polar Flow holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Polar Flow has 50K ratings behind it against 4, so its average is the more settled of the two. Written reviews split almost evenly too, at 50% and 50% positive.

Polar Flow ships an update monthly, Syncro every 3 weeks. The most recent releases landed on October 16, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Polar Flow | Syncro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (50K ratings)](https://appshunter.io/ios/app/polar-flow/id717172678/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/syncro/id1440671289/reviews) |
| Number of ratings | **50K** | 4 |
| Positive reviews | 49.6% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 189 MB | 64 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Polar Electro](https://appshunter.io/developer/532468555) | [Swift Performance P/L](https://appshunter.io/developer/569711861) |

## 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


### Syncro

[App page](https://appshunter.io/ios/app/syncro/id1440671289)

This app connects to specialized hardware to track and analyze performance data. It provides insights to help users understand and improve their physical capabilities.

**Highlights:** Connects to Swift DNA hardware, Performance data tracking, Data analysis and insights, Improve physical capabilities

**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 Syncro free?

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

### Which has better reviews, Polar Flow or Syncro?

Polar Flow is rated higher. Polar Flow averages 4.6 out of 5 from 50K ratings, while Syncro averages 4.0 from 4 ratings.

### Do Polar Flow or Syncro have ads?

Neither Polar Flow nor Syncro shows ads.

### Which is updated more often, Polar Flow or Syncro?

Polar Flow ships an update monthly, and Syncro every 3 weeks. Most recently, Polar Flow was updated on October 16, 2026 and Syncro on October 2, 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.*