# TextbookDojo vs AI Physics Explanation

The clearest difference is update cadence: TextbookDojo at every 9 days against AI Physics Explanation's every 6 weeks. TextbookDojo also leads on device support (3 vs 1) and iOS requirement (14.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. TextbookDojo sells 3 in-app purchases, starting at $4.49 per month and AI Physics Explanation sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

TextbookDojo ships an update every 9 days, AI Physics Explanation every 6 weeks. The most recent releases landed on June 1, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | TextbookDojo | AI Physics Explanation |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 6 weeks |
| Size | 102 MB | 20 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ROBOBO, K.K.](https://appshunter.io/developer/1338822905) | [SPARKLE AND, K.K.](https://appshunter.io/developer/1572402899) |

## What reviewers say

### TextbookDojo

[App page](https://appshunter.io/ios/app/textbookdojo/id1338822906)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month payment | $4.49 | per month |
| 1 year payment | $19.99 | per year |
| プレミアム年払い（期間限定特別価格） | $19.99 | per year |


### AI Physics Explanation

[App page](https://appshunter.io/ios/app/ai-physics-explanation/id6743636113)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| MonthlySubscription | $5.99 | per month |


## Frequently asked questions

### Is TextbookDojo free?

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

### Is AI Physics Explanation free?

AI Physics Explanation is free to download, with in-app purchases available.

### Do TextbookDojo or AI Physics Explanation have ads?

Both TextbookDojo and AI Physics Explanation show ads.

### Which is updated more often, TextbookDojo or AI Physics Explanation?

TextbookDojo ships an update every 9 days, and AI Physics Explanation every 6 weeks. Most recently, TextbookDojo was updated on June 1, 2026 and AI Physics Explanation on August 16, 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.*