# 口才练习 21 天 vs MuscleFlip

The clearest difference is update cadence: MuscleFlip at every 4 weeks against 口才练习 21 天's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 口才练习 21 天 sells 1 one-off in-app purchase and MuscleFlip sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

口才练习 21 天 ships an update every 2 months, MuscleFlip every 4 weeks. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 口才练习 21 天 | MuscleFlip |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 12 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [阳 孙](https://appshunter.io/developer/1518808403) | [Kiichi Takazakura](https://appshunter.io/developer/1896767004) |

## What reviewers say

### 口才练习 21 天

[App page](https://appshunter.io/ios/app/21/id6755531952)

Improve your public speaking and communication skills with AI-powered practice. This app offers daily exercises and feedback to help you speak more confidently and clearly in various situations, from interviews to presentations. Achieve noticeable progress in just 21 days.

**Highlights:** AI voice analysis and scoring, 21-day systematic training plan, Multi-scenario practice modules, Progress visualization, Daily 10-15 minute sessions, Practice history playback

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解锁21天口才 | $0.99 | one-time |


### MuscleFlip

[App page](https://appshunter.io/ios/app/muscleflip/id6770926014)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MuscleFlip Pro (Monthly) | $2.99 | per month |


## Frequently asked questions

### Is 口才练习 21 天 free?

口才练习 21 天 is free to download, with in-app purchases available.

### Is MuscleFlip free?

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

### Do 口才练习 21 天 or MuscleFlip have ads?

Neither 口才练习 21 天 nor MuscleFlip shows ads.

### Which is updated more often, 口才练习 21 天 or MuscleFlip?

口才练习 21 天 ships an update every 2 months, and MuscleFlip every 4 weeks. Most recently, 口才练习 21 天 was updated on October 21, 2026 and MuscleFlip on October 19, 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.*