# ObsiKO vs Athena Reader

The clearest difference is in-app purchases: ObsiKO at none against Athena Reader's 9. Athena Reader's advantage is update cadence (every 2 days vs every 6 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Athena Reader sells 9 in-app purchases, starting at $10.99 per month. ObsiKO asks for nothing beyond the download.

ObsiKO ships an update every 6 days, Athena Reader every 2 days. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ObsiKO | Athena Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 2 days** |
| Size | 75 MB | 89 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Hyojin Kim](https://appshunter.io/developer/6783405453) | [祥 刘](https://appshunter.io/developer/6802489561) |

## What reviewers say

### ObsiKO

[App page](https://appshunter.io/ios/app/obsiko-ai-note-plus-mindmap/id6783405451)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 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 ObsiKO free?

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

### Is Athena Reader free?

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

### Do ObsiKO or Athena Reader have ads?

Neither ObsiKO nor Athena Reader shows ads.

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

ObsiKO ships an update every 6 days, and Athena Reader every 2 days. Most recently, ObsiKO was updated on October 10, 2026 and Athena Reader on October 7, 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.*