# Octavo Reader vs ReadOS

The clearest difference is in-app purchases: Octavo Reader at none against ReadOS's 2. Octavo Reader also leads on update cadence (daily vs monthly) and iOS requirement (18.5 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. ReadOS sells 2 in-app purchases, starting at $19.99 per year. Octavo Reader asks for nothing beyond the download.

Octavo Reader ships an update daily, ReadOS monthly. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Octavo Reader | ReadOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/reados/id6796672534/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Monthly |
| Monetization | — | Freemium |
| Size | 1 MB | 993 MB |
| Requires iOS | **18.5** | 26.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Desheng Xu](https://appshunter.io/developer/1833833819) | [秀芳 王](https://appshunter.io/developer/1893898139) |

## What reviewers say

### Octavo Reader

[App page](https://appshunter.io/ios/app/octavo-reader/id6751176618)

**Features:** macOS Compatibility

**In-app purchases:** none


### ReadOS

[App page](https://appshunter.io/ios/app/reados/id6796672534)

This app is an AI-powered workspace for iPad that helps you read, research, and create. It connects your source materials and project context, allowing you to move seamlessly from understanding to creation. Features include AI summarization, knowledge mapping, and document analysis.

**Highlights:** AI-powered research agent, Contextual reading and note-taking, Knowledge mapping and visualization, Document, spreadsheet, and presentation creation, Web browsing and data analysis, Audio and video transcription, Multi-step task automation

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadOS Pro Annual | $19.99 | per year |
| ReadOS Pro Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is Octavo Reader free?

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

### Is ReadOS free?

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

### Do Octavo Reader or ReadOS have ads?

Neither Octavo Reader nor ReadOS shows ads.

### Which is updated more often, Octavo Reader or ReadOS?

Octavo Reader ships an update daily, and ReadOS monthly. Most recently, Octavo Reader was updated on October 9, 2026 and ReadOS on October 18, 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.*