# AI Study Notes vs DSE MistakeBook

The clearest difference is in-app purchases: DSE MistakeBook at none against AI Study Notes's 3. AI Study Notes's advantage is update cadence (every 6 days vs every 2 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. AI Study Notes sells 3 one-off in-app purchases. DSE MistakeBook asks for nothing beyond the download.

AI Study Notes ships an update every 6 days, DSE MistakeBook every 2 weeks. The most recent releases landed on October 30, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | AI Study Notes | DSE MistakeBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 weeks |
| Size | 62 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pickmy AI](https://appshunter.io/developer/1869516043) | [Yin Man Cheung](https://appshunter.io/developer/6799562449) |

## What reviewers say

### AI Study Notes

[App page](https://appshunter.io/ios/app/ai-study-notes-pickmyquiz/id6743378374)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 90-day Pro Offer | $12.99 | one-time |
| Pro 180 Days | $14.99 | one-time |
| Pro 90 Days | $14.99 | one-time |


### DSE MistakeBook

[App page](https://appshunter.io/ios/app/dse-mistakebook/id6799562447)

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

**In-app purchases:** none


## Frequently asked questions

### Is AI Study Notes free?

AI Study Notes is free to download, with in-app purchases available.

### Is DSE MistakeBook free?

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

### Do AI Study Notes or DSE MistakeBook have ads?

Neither AI Study Notes nor DSE MistakeBook shows ads.

### Which is updated more often, AI Study Notes or DSE MistakeBook?

AI Study Notes ships an update every 6 days, and DSE MistakeBook every 2 weeks. Most recently, AI Study Notes was updated on October 30, 2026 and DSE MistakeBook on October 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.*