CatEar vs Onsei
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CatEar
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.
- Speech recognition training
- Noise interference practice
- Telephone voice simulation
- Musical instrument timbre practice
- Progress tracking
- Noise detection
- Hearing tests
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CatEar is a professional listening training application designed for individuals with hearing impairments, language learners, and anyone looking to improve their listening skills. With scientifically effective training modules, the app helps users steadily enhance their speech recognition ability, offering a better auditory experience. Core Features: The app includes existing speech training content, such as single-syllable word training, noise interference training, telephone voice simulation, musical instrument timbre practice, and more. Detailed historical records to track your training progress! Additional tools related to hearing, such as noise detection, hearing tests, and hearing chart records. Legal Terms: This app complies with Apple's standard software licensing agreement (EULA). Please visit https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ for more details.
Onsei
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Onsei is a Japanese learning app designed for focused daily study. Build vocabulary and grammar with spaced repetition, clear review flows, native audio, and scenario-based practice that helps you turn study into real usage. Features: • Vocabulary and grammar review • Spaced repetition scheduling • Daily study sessions and progress tracking • Japanese audio playback • Optional account sync across devices • Scenario-based practice for everyday situations
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 4, 2026 and October 6, 2026 respectively.
| Parameter | CatEar | Onsei |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 273 MB | 33 MB |
| Age rating | 4+ | 12+ |
| Developer | 雄杰 杨 | 鑫 陈 |
In-app purchases
CatEar
- 包年$4.991 Year
- 包月$6.991 Month
- 红心补充包(10颗)$0.99
- Lifetime$19.99
Onsei
No in-app purchases









