# KeyTap vs GRETA OTO

The clearest difference is in-app purchases: GRETA OTO at none against KeyTap's 10. GRETA OTO also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. KeyTap sells 10 in-app purchases, starting at $14.49 per month. GRETA OTO asks for nothing beyond the download.

KeyTap ships an update monthly, GRETA OTO every 4 weeks. The most recent releases landed on November 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KeyTap | GRETA OTO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (7 ratings)](https://appshunter.io/ios/app/keytap/id1623315458/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 54.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 213 MB | 136 MB |
| Requires iOS | 13.0 | **12.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Shanghai Lingzhuo Information Technology Co., Ltd.](https://appshunter.io/developer/1449345357) | [绍纲 汪](https://appshunter.io/developer/1792148257) |

## What reviewers say

### KeyTap

[App page](https://appshunter.io/ios/app/keytap/id1623315458)

Learn to play piano with AI guidance. This app offers customized lessons, music theory, and a vast song library for all skill levels. Track progress and get instant feedback through your device's microphone or MIDI connection.

**Highlights:** AI Piano Tutor guidance, Customized lessons for all levels, Music theory and technique instruction, Vast sheet music library, Progress tracking and instant feedback, Virtual keyboard for touch lessons

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1个月高级会员 | $14.49 | per month |
| 12个月高级会员 | $28.99 | per year |
| 12个月高级会员（248） | $36.99 | per year |
| 月卡会员 | $4.99 | one-time |
| 年卡会员 | $24.99 | one-time |
| 终生会员（248） | $34.99 | one-time |
| 终生会员（328） | $49.99 | one-time |
| 终生会员（348） | $49.99 | one-time |
| 年卡会员 | $99.99 | one-time |
| 终身会员 | $149.99 | one-time |


### GRETA OTO

[App page](https://appshunter.io/ios/app/greta-oto/id6740990140)

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

**In-app purchases:** none


## Frequently asked questions

### Is KeyTap free?

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

### Is GRETA OTO free?

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

### Do KeyTap or GRETA OTO have ads?

KeyTap shows ads; GRETA OTO does not.

### Which is updated more often, KeyTap or GRETA OTO?

KeyTap ships an update monthly, and GRETA OTO every 4 weeks. Most recently, KeyTap was updated on November 3, 2026 and GRETA OTO on October 24, 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.*