# Einstein Study AI Coach vs BrainDen

The clearest difference is update cadence: Einstein Study AI Coach at every 3 days against BrainDen's monthly. BrainDen's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Einstein Study AI Coach sells 2 in-app purchases, starting at $5.99 per month and BrainDen sells 3 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

Einstein Study AI Coach ships an update every 3 days, BrainDen monthly. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Einstein Study AI Coach | BrainDen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Size | 18 MB | 49 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Plata](https://appshunter.io/developer/1467546479) | [Ogbemudia Terry Osayawe](https://appshunter.io/developer/1678791059) |

## What reviewers say

### Einstein Study AI Coach

[App page](https://appshunter.io/ios/app/einstein-study-ai-coach/id6754023929)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly | $5.99 | per month |
| Premium annual | $19.99 | per year |


### BrainDen

[App page](https://appshunter.io/ios/app/brainden-lecture-note-taker/id6757434859)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BrainDen Pro - Monthly | $19.99 | per month |
| 6-Month Pro Subscription | $49.99 | per 6 months |
| BrainDen Pro - Annual Subscription | $99.99 | per year |


## Frequently asked questions

### Is Einstein Study AI Coach free?

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

### Is BrainDen free?

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

### Do Einstein Study AI Coach or BrainDen have ads?

Neither Einstein Study AI Coach nor BrainDen shows ads.

### Which is updated more often, Einstein Study AI Coach or BrainDen?

Einstein Study AI Coach ships an update every 3 days, and BrainDen monthly. Most recently, Einstein Study AI Coach was updated on October 17, 2026 and BrainDen on October 11, 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.*