# 妙算21 vs Elbow Strike

The clearest difference is price: 妙算21 at Free against Elbow Strike's $0.99. 妙算21 also leads on iOS requirement (15.0 vs 17.0). Elbow Strike's advantage is ads (none vs shown) and update cadence (every 3 days vs weekly). On in-app purchases and device support there is nothing between them.

妙算21 is free to download; Elbow Strike costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

妙算21 ships an update weekly, Elbow Strike every 3 days. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 妙算21 | Elbow Strike |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/21/id6743411073/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | **Ad-supported** | Paid |
| Size | 69 MB | 19 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [抗抗 韩](https://appshunter.io/developer/1681688691) | [龙 马](https://appshunter.io/developer/1858588345) |

## What reviewers say

### 妙算21

[App page](https://appshunter.io/ios/app/21/id6743411073)

A simple and fun number addition elimination game. Enjoy endless entertainment with this addictive puzzle experience.

**Highlights:** Number addition, Elimination mechanics, Simple gameplay, Addictive puzzle, Casual entertainment

**Features:** macOS Compatibility

**In-app purchases:** none


### Elbow Strike

[App page](https://appshunter.io/ios/app/elbow-strike/id6761071037)

Track your elbow strikes with motion-sensing technology on your iPhone or Apple Watch. This app offers a fun and immersive workout experience by recognizing your arm movements.

**Highlights:** Motion-sensing workout tracking, Record elbow strikes, iPhone and Apple Watch integration, Powerful motion recognition, Immersive workout experience

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 妙算21 free?

妙算21 is free to download, with no in-app purchases.

### Is Elbow Strike free?

Elbow Strike costs $0.99, with no in-app purchases.

### Do 妙算21 or Elbow Strike have ads?

妙算21 shows ads; Elbow Strike does not.

### Which is updated more often, 妙算21 or Elbow Strike?

妙算21 ships an update weekly, and Elbow Strike every 3 days. Most recently, 妙算21 was updated on October 3, 2026 and Elbow Strike on October 11, 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.*