# Polar Flow vs Ether Trails

The clearest difference is update cadence: Ether Trails at every 4 days against Polar Flow's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Polar Flow sells 1 in-app purchase, starting at $8.99 per month and Ether Trails sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Polar Flow ships an update monthly, Ether Trails every 4 days. The most recent releases landed on November 14, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Polar Flow | Ether Trails |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (50K ratings)](https://appshunter.io/ios/app/polar-flow/id717172678/reviews)** | — |
| Number of ratings | **50K** | — |
| Positive reviews | 49.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Freemium | — |
| Size | 191 MB | 50 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Polar Electro](https://appshunter.io/developer/532468555) | [Reloom Studios (OPC) Private Limited](https://appshunter.io/developer/1866132319) |

## 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


### Ether Trails

[App page](https://appshunter.io/ios/app/ether-trails/id6775376677)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ether Weekly Subscription | $3.99 | per 7 days |
| Ether Monthly Subscription | $9.99 | per month |


## Frequently asked questions

### Is Polar Flow free?

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

### Is Ether Trails free?

Ether Trails is free to download, with in-app purchases available.

### Do Polar Flow or Ether Trails have ads?

Neither Polar Flow nor Ether Trails shows ads.

### Which is updated more often, Polar Flow or Ether Trails?

Polar Flow ships an update monthly, and Ether Trails every 4 days. Most recently, Polar Flow was updated on November 14, 2026 and Ether Trails on November 5, 2026.

---

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