# BaiPDF vs Athena Reader

The clearest difference is update cadence: BaiPDF at daily against Athena Reader's every 4 days. Athena Reader's advantage is iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. BaiPDF sells 9 in-app purchases, starting at $3.49 per month and Athena Reader sells 9 in-app purchases, starting at $10.99 per month. Whichever you choose, the download price is not the number that matters.

BaiPDF ships an update daily, Athena Reader every 4 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | BaiPDF | Athena Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 4 days |
| Size | 9 MB | 111 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Uzero Technology](https://appshunter.io/developer/1485380269) | [祥 刘](https://appshunter.io/developer/6802489561) |

## What reviewers say

### BaiPDF

[App page](https://appshunter.io/ios/app/baipdf-scan-and-pdf-convert/id6781993555)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $3.49 | per month |
| Quarterly Membership | $6.99 | per 3 months |
| Yearly Membership | $11.99 | per year |
| 30-Page Pack | $1.29 | one-time |
| 100-Page Pack | $1.79 | one-time |
| 200-Page Pack | $2.49 | one-time |
| 500-Page Pack | $4.99 | one-time |
| 1,000-Page Pack | $7.49 | one-time |
| 5,000-Page Pack | $34.99 | one-time |


### Athena Reader

[App page](https://appshunter.io/ios/app/athena-reader-ai-notebook/id6802726804)

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Athena Pro Monthly | $10.99 | per month |
| Athena Pro Quarterly | $27.99 | per 3 months |
| Athena Pro Yearly | $79.99 | per year |
| 200 AI Chats | $5.99 | one-time |
| +10GB (about 3,000 books) | $5.99 | one-time |
| OCR 10 Books | $6.99 | one-time |
| 500 AI Chats | $11.99 | one-time |
| OCR 30 Books | $16.99 | one-time |
| 1200 AI Chats | $23.99 | one-time |


## Frequently asked questions

### Is BaiPDF free?

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

### Is Athena Reader free?

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

### Do BaiPDF or Athena Reader have ads?

Neither BaiPDF nor Athena Reader shows ads.

### Which is updated more often, BaiPDF or Athena Reader?

BaiPDF ships an update daily, and Athena Reader every 4 days. Most recently, BaiPDF was updated on October 24, 2026 and Athena Reader on October 24, 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.*