# SuuNavi vs 21日で学ぶ歎異抄

The clearest difference is in-app purchases: 21日で学ぶ歎異抄 at none against SuuNavi's 3. 21日で学ぶ歎異抄 also leads on update cadence (every 4 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SuuNavi sells 3 in-app purchases, starting at $1.99 per 7 days. 21日で学ぶ歎異抄 asks for nothing beyond the download.

SuuNavi ships an update fortnightly, 21日で学ぶ歎異抄 every 4 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SuuNavi | 21日で学ぶ歎異抄 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/suunavi/id6756963176/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [CYBER AI LABS PTE. LTD.](https://appshunter.io/developer/1837402574) | [Yoshihide Matsumoto](https://appshunter.io/developer/6788531770) |

## What reviewers say

### SuuNavi

[App page](https://appshunter.io/ios/app/suunavi/id6756963176)

This AI-powered math tutor helps middle and high school students understand complex problems. Simply photograph or type a math question, and receive clear, step-by-step explanations and practice exercises. It fosters deep understanding through a cycle of explanation, practice, and reflection.

**Highlights:** AI-powered math problem explanation, Photo recognition for math problems, Step-by-step solution breakdown, Personalized practice problem generation, Progress tracking and review, On-demand learning anytime, anywhere

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Trial Plan | $1.99 | per 7 days |
| Semester Plan | $19.99 | per 3 months |
| Yearly Plan | $59.99 | per year |


### 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 SuuNavi free?

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

### 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 SuuNavi or 21日で学ぶ歎異抄 have ads?

Neither SuuNavi nor 21日で学ぶ歎異抄 shows ads.

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

SuuNavi ships an update fortnightly, and 21日で学ぶ歎異抄 every 4 days. Most recently, SuuNavi was updated on October 24, 2026 and 21日で学ぶ歎異抄 on October 7, 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.*