# Polar Flow vs Rocket

The clearest difference is rating: Polar Flow at 4.6 against Rocket's 1.0. Polar Flow also leads on ratings volume (50K vs 1). Rocket's advantage is review sentiment (83% vs 50%) and update cadence (every 5 days vs monthly). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Polar Flow sells 1 in-app purchase, starting at $8.99 per month and Rocket sells 2 in-app purchases, starting at $29.99 per month. Whichever you choose, the download price is not the number that matters.

Polar Flow holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Polar Flow has 50K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of Polar Flow's written reviews are positive against 83% of Rocket's, so the app with the better star average is not the one people write more warmly about.

Polar Flow ships an update monthly, Rocket every 5 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Polar Flow | Rocket |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (50K ratings)](https://appshunter.io/ios/app/polar-flow/id717172678/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/rocket-running-and-triathlon/id6759940607/reviews) |
| Number of ratings | **50K** | 1 |
| Positive reviews | 49.6% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 189 MB | 154 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Polar Electro](https://appshunter.io/developer/532468555) | [Rocket Endurance Pty Ltd](https://appshunter.io/developer/1881787061) |

## 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


### Rocket

[App page](https://appshunter.io/ios/app/rocket-running-and-triathlon/id6759940607)

This adaptive training app creates personalized, multi-discipline plans for athletes balancing various sports like triathlon, HYROX, and running. It automatically adjusts your schedule based on your life events and training progress, offering the intelligence of a personal coach at a fraction of the cost.

**Highlights:** Personalized multi-discipline training plans, Adaptive load management, Automatic schedule adjustments, Strava and watch sync, Supports up to 10 races annually, Built by coaches and scientists

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rocket Monthly | $29.99 | per month |
| Rocket Annual | $169.99 | per year |


## Frequently asked questions

### Is Polar Flow free?

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

### Is Rocket free?

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

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

Polar Flow is rated higher. Polar Flow averages 4.6 out of 5 from 50K ratings, while Rocket averages 1.0 from 1 ratings.

### Do Polar Flow or Rocket have ads?

Neither Polar Flow nor Rocket shows ads.

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

Polar Flow ships an update monthly, and Rocket every 5 days. Most recently, Polar Flow was updated on October 28, 2026 and Rocket on October 25, 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.*