# Polar Flow vs LIBRO

The clearest difference is review sentiment: Polar Flow at 50% against LIBRO's 4%. Polar Flow also leads on rating (4.6 vs 2.5) and update cadence (monthly vs every 7 months). LIBRO's advantage is in-app purchases (none vs 1) and iOS requirement (14.0 vs 17.0). On price, ads 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. LIBRO asks for nothing beyond the download.

Polar Flow holds the better App Store score, 4.6 against 2.5. That said, the two scores are not equally well evidenced: Polar Flow has 50K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Polar Flow's written reviews are positive against 4% of LIBRO's.

Polar Flow ships an update monthly, LIBRO every 7 months. The most recent releases landed on October 31, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Polar Flow | LIBRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (50K ratings)](https://appshunter.io/ios/app/polar-flow/id717172678/reviews)** | [2.5 (2 ratings)](https://appshunter.io/ios/app/libro/id1322524427/reviews) |
| Number of ratings | **50K** | 2 |
| Positive reviews | **49.6% of reviews** | 4.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 189 MB | 10 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Polar Electro](https://appshunter.io/developer/532468555) | [Nutritics Limited](https://appshunter.io/developer/1322524426) |

## 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


### LIBRO

[App page](https://appshunter.io/ios/app/libro/id1322524427)

This AI-powered health assistant helps you track diet, exercise, and lifestyle goals with features like voice logging and a barcode scanner. It offers personalized suggestions and meal planning tools. Access is currently by invitation only from an accredited nutrition professional.

**Highlights:** AI-powered health tracking, Voice logging, Barcode scanner, Personalized suggestions, Diet and activity logging, Meal planning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Polar Flow free?

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

### Is LIBRO free?

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

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

Polar Flow is rated higher. Polar Flow averages 4.6 out of 5 from 50K ratings, while LIBRO averages 2.5 from 2 ratings.

### Do Polar Flow or LIBRO have ads?

Neither Polar Flow nor LIBRO shows ads.

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

Polar Flow ships an update monthly, and LIBRO every 7 months. Most recently, Polar Flow was updated on October 31, 2026 and LIBRO on October 18, 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.*