# RheoFit vs Usay

The clearest difference is review sentiment: Usay at 100% against RheoFit's 33%. Usay also leads on rating (5.0 vs 3.7). RheoFit's advantage is update cadence (weekly vs every 3 weeks) and ratings volume (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Usay holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews point the same way: 33% of RheoFit's written reviews are positive against 100% of Usay's.

RheoFit ships an update weekly, Usay every 3 weeks. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RheoFit | Usay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/rheofit/id6497569508/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/usay/id6759780128/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 192 MB | 162 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Yunwang Innovation Intelligence (shenzhen) Co., Ltd.](https://appshunter.io/developer/1725094284) | [Fison Health Co., Limited](https://appshunter.io/developer/1880602351) |

## What reviewers say

### RheoFit

[App page](https://appshunter.io/ios/app/rheofit/id6497569508)

This app serves as a personal rehabilitation therapist, offering customizable massage experiences for muscle recovery. It provides various modes, pre-designed solutions for different needs, and allows users to monitor device battery life.

**Highlights:** Customizable massage intervals and duration, Multiple speed and focus modes, 43 rehabilitation solutions for various needs, Real-time battery status monitoring, User guide and functional explanations

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

**In-app purchases:** none


### Usay

[App page](https://appshunter.io/ios/app/usay/id6759780128)

This app offers a silent companion for self-reflection, tracking emotional states, mental fluctuations, and energy rhythms. It uses advanced physiological sensing to help manage stress, improve sleep, and monitor energy levels, blending seamlessly into daily life.

**Highlights:** Emotional state observation, Mental fluctuation tracking, Energy rhythm monitoring, Stress management, Sleep improvement, Physiological sensing

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

**In-app purchases:** none


## Frequently asked questions

### Is RheoFit free?

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

### Is Usay free?

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

### Which has better reviews, RheoFit or Usay?

Usay is rated higher. RheoFit averages 3.7 out of 5 from 3 ratings, while Usay averages 5.0 from 1 ratings.

### Do RheoFit or Usay have ads?

Neither RheoFit nor Usay shows ads.

### Which is updated more often, RheoFit or Usay?

RheoFit ships an update weekly, and Usay every 3 weeks. Most recently, RheoFit was updated on November 12, 2026 and Usay on October 31, 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.*