# AskPDF vs Einstein Study AI Coach

The clearest difference is update cadence: Einstein Study AI Coach at every 3 days against AskPDF's every 14 months. AskPDF's advantage is device support (3 vs 1) and iOS requirement (15 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. AskPDF sells 6 in-app purchases, starting at $7.99 per 7 days and Einstein Study AI Coach sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

AskPDF ships an update every 14 months, Einstein Study AI Coach every 3 days. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | AskPDF | Einstein Study AI Coach |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 3 days** |
| Size | 86 MB | 18 MB |
| Requires iOS | **15** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cihat Akkiraz](https://appshunter.io/developer/1535970770) | [Daniel Plata](https://appshunter.io/developer/1467546479) |

## What reviewers say

### AskPDF

[App page](https://appshunter.io/ios/app/askpdf-chat-pdf-ai-summary/id6746080072)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AskPDF Pro Weekly | $7.99 | per 7 days |
| AskPDF Pro Monthly | $19.99 | per month |
| AskPDF Pro Package 1 | $4.99 | one-time |
| AskPDF Pro Package 2 | $9.99 | one-time |
| AskPDF Pro Package 3 | $24.99 | one-time |
| AskPDF Pro Package 4 | $29.99 | one-time |


### 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 |


## Frequently asked questions

### Is AskPDF free?

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

### Is Einstein Study AI Coach free?

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

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

Neither AskPDF nor Einstein Study AI Coach shows ads.

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

AskPDF ships an update every 14 months, and Einstein Study AI Coach every 3 days. Most recently, AskPDF was updated on October 6, 2026 and Einstein Study AI Coach on October 1, 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.*