# CatEar vs Onsei

The clearest difference is in-app purchases: Onsei at none against CatEar's 4. Onsei also leads on iOS requirement (15.1 vs 17.0). CatEar's advantage is update cadence (every 2 days vs every 10 days). On price, ads and device support there is nothing between them.

Both are free to download. CatEar sells 4 in-app purchases, starting at $4.99 per year. Onsei asks for nothing beyond the download.

CatEar ships an update every 2 days, Onsei every 10 days. The most recent releases landed on October 20, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | CatEar | Onsei |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/catear/id6751868252/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 10 days |
| Monetization | Free with in-app purchases | — |
| Size | 273 MB | 33 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [雄杰 杨](https://appshunter.io/developer/1775233913) | [鑫 陈](https://appshunter.io/developer/1709457072) |

## What reviewers say

### CatEar

[App page](https://appshunter.io/ios/app/catear/id6751868252)

Enhance your auditory perception with scientifically designed modules. Improve speech recognition, practice with various sound simulations, and track your progress with detailed records. Includes tools for hearing tests and noise detection.

**Highlights:** Speech recognition training, Noise interference practice, Telephone voice simulation, Musical instrument timbre practice, Progress tracking, Noise detection, Hearing tests

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 包年 | $4.99 | per year |
| 包月 | $6.99 | per month |
| 红心补充包（10颗） | $0.99 | one-time |
| Lifetime | $19.99 | one-time |


### Onsei

[App page](https://appshunter.io/ios/app/onsei/id6761715885)

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

**In-app purchases:** none


## Frequently asked questions

### Is CatEar free?

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

### Is Onsei free?

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

### Do CatEar or Onsei have ads?

Neither CatEar nor Onsei shows ads.

### Which is updated more often, CatEar or Onsei?

CatEar ships an update every 2 days, and Onsei every 10 days. Most recently, CatEar was updated on October 20, 2026 and Onsei on October 6, 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.*