# 咲耶のおてつだいチャレンジ vs 21日で学ぶ歎異抄

The clearest difference is update cadence: 咲耶のおてつだいチャレンジ at every 2 days against 21日で学ぶ歎異抄's every 4 days. 咲耶のおてつだいチャレンジ also leads on iOS requirement (13.0 vs 17.0). 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.

咲耶のおてつだいチャレンジ ships an update every 2 days, 21日で学ぶ歎異抄 every 4 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 咲耶のおてつだいチャレンジ | 21日で学ぶ歎異抄 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Size | 102 MB | 6 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nihon no Inaka ha Shihonshugi no Frontier da LLC.](https://appshunter.io/developer/796913059) | [Yoshihide Matsumoto](https://appshunter.io/developer/6788531770) |

## What reviewers say

### 咲耶のおてつだいチャレンジ

[App page](https://appshunter.io/ios/app/id6786641595)

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

**In-app purchases:** none


### 21日で学ぶ歎異抄

[App page](https://appshunter.io/ios/app/21/id6788531768)

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

**In-app purchases:** none


## Frequently asked questions

### Is 咲耶のおてつだいチャレンジ free?

咲耶のおてつだいチャレンジ is free to download, with no in-app purchases.

### Is 21日で学ぶ歎異抄 free?

21日で学ぶ歎異抄 is free to download, with no in-app purchases.

### Do 咲耶のおてつだいチャレンジ or 21日で学ぶ歎異抄 have ads?

Neither 咲耶のおてつだいチャレンジ nor 21日で学ぶ歎異抄 shows ads.

### Which is updated more often, 咲耶のおてつだいチャレンジ or 21日で学ぶ歎異抄?

咲耶のおてつだいチャレンジ ships an update every 2 days, and 21日で学ぶ歎異抄 every 4 days. Most recently, 咲耶のおてつだいチャレンジ was updated on October 24, 2026 and 21日で学ぶ歎異抄 on October 31, 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.*