# 21日で学ぶ歎異抄 vs 明鏡

The clearest difference is iOS requirement: 明鏡 at 13.0 against 21日で学ぶ歎異抄's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

21日で学ぶ歎異抄 ships an update every 4 days, 明鏡 weekly. The most recent releases landed on September 20, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | 21日で学ぶ歎異抄 | 明鏡 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | — | Free |
| Size | 6 MB | 87 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yoshihide Matsumoto](https://appshunter.io/developer/6788531770) | [Nihon no Inaka ha Shihonshugi no Frontier da LLC.](https://appshunter.io/developer/796913059) |

## What reviewers say

### 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


### 明鏡

[App page](https://appshunter.io/ios/app/ai/id6792995299)

Learn AI, marketing, and general knowledge through text, video, and AI audio lectures. Track your progress with reading, bookmarks, and notes. Enjoy daily recommended readings and a podcast.

**Highlights:** Text and video lectures, AI audio learning, Audiobook-style playback, Daily podcast, Learning progress tracking, Daily recommended readings

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

**In-app purchases:** none


## Frequently asked questions

### 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.

### Is 明鏡 free?

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

### Do 21日で学ぶ歎異抄 or 明鏡 have ads?

Neither 21日で学ぶ歎異抄 nor 明鏡 shows ads.

### Which is updated more often, 21日で学ぶ歎異抄 or 明鏡?

21日で学ぶ歎異抄 ships an update every 4 days, and 明鏡 weekly. Most recently, 21日で学ぶ歎異抄 was updated on September 20, 2026 and 明鏡 on September 28, 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.*