# CSM LearnStrike vs Sharpener

The clearest difference is update cadence: Sharpener at daily against CSM LearnStrike's every 3 weeks. CSM LearnStrike's advantage is iOS requirement (14.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CSM LearnStrike ships an update every 3 weeks, Sharpener daily. The most recent releases landed on September 9, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | CSM LearnStrike | Sharpener |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 301 MB | 6 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [4Growth.com](https://appshunter.io/developer/1728434002) | [Salvador Jr Respeto](https://appshunter.io/developer/1534637839) |

## What reviewers say

### CSM LearnStrike

[App page](https://appshunter.io/ios/app/csm-learnstrike/id6450264607)

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

**In-app purchases:** none


### Sharpener

[App page](https://appshunter.io/ios/app/sharpener-the-quiz-maker/id6762046047)

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

**In-app purchases:** none


## Frequently asked questions

### Is CSM LearnStrike free?

CSM LearnStrike is free to download, with no in-app purchases.

### Is Sharpener free?

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

### Do CSM LearnStrike or Sharpener have ads?

Neither CSM LearnStrike nor Sharpener shows ads.

### Which is updated more often, CSM LearnStrike or Sharpener?

CSM LearnStrike ships an update every 3 weeks, and Sharpener daily. Most recently, CSM LearnStrike was updated on September 9, 2026 and Sharpener on September 5, 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.*