# Biodibal vs StudyNotes

The clearest difference is in-app purchases: Biodibal at none against StudyNotes's 2. Biodibal also leads on iOS requirement (13.0 vs 16.4). StudyNotes's advantage is update cadence (daily vs every 33 months). On price, ads and device support there is nothing between them.

Both are free to download. StudyNotes sells 2 in-app purchases, starting at $5.99 per 7 days. Biodibal asks for nothing beyond the download.

Biodibal ships an update every 33 months, StudyNotes daily. The most recent releases landed on September 30, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Biodibal | StudyNotes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 33 months | **Daily** |
| Size | 23 MB | 86 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fundacio Universitat-Empresa de les Illes Balears](https://appshunter.io/developer/1031165711) | [Bekir Genc](https://appshunter.io/developer/1780208238) |

## What reviewers say

### Biodibal

[App page](https://appshunter.io/ios/app/biodibal/id1549190292)

**In-app purchases:** none


### StudyNotes

[App page](https://appshunter.io/ios/app/studynotes-note-taking-ai/id6748883708)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is Biodibal free?

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

### Is StudyNotes free?

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

### Do Biodibal or StudyNotes have ads?

Neither Biodibal nor StudyNotes shows ads.

### Which is updated more often, Biodibal or StudyNotes?

Biodibal ships an update every 33 months, and StudyNotes daily. Most recently, Biodibal was updated on September 30, 2026 and StudyNotes on October 17, 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.*