# 掌上键笙 vs 合唱蛙

The clearest difference is review sentiment: 掌上键笙 at 100% against 合唱蛙's 20%. 合唱蛙's advantage is price (Free vs $3.99) and update cadence (every 3 weeks vs every 9 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

合唱蛙 is free to download; 掌上键笙 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

掌上键笙 ships an update every 9 months, 合唱蛙 every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | 掌上键笙 | 合唱蛙 |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/app/id1558836828/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | **100.0% of reviews** | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 89 MB | 283 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [鑫磊 张](https://appshunter.io/developer/1051215758) | [鑫 孟](https://appshunter.io/developer/1264513934) |

## What reviewers say

### 掌上键笙

[App page](https://appshunter.io/ios/app/id1182217883)

**Features:** Vision Pro support

**In-app purchases:** none


### 合唱蛙

[App page](https://appshunter.io/ios/app/app/id1558836828)

This app uses AI to help choir members practice and improve their pitch and rhythm. It offers features like AI scoring, adjustable playback speed, and the ability to manage choir groups and assignments for conductors.

**Highlights:** AI pitch and rhythm scoring, Sheet music display (staff & numbered notation), Adjustable playback and singing speed, Choir group management, Assignment mode for conductors, Recording and accompaniment support

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

**In-app purchases:** none


## Frequently asked questions

### Is 掌上键笙 free?

掌上键笙 costs $3.99, with no in-app purchases.

### Is 合唱蛙 free?

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

### Do 掌上键笙 or 合唱蛙 have ads?

Neither 掌上键笙 nor 合唱蛙 shows ads.

### Which is updated more often, 掌上键笙 or 合唱蛙?

掌上键笙 ships an update every 9 months, and 合唱蛙 every 3 weeks. Most recently, 掌上键笙 was updated on October 24, 2026 and 合唱蛙 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.*