# do!book vs Saniiro Books

The clearest difference is iOS requirement: do!book at 9.0 against Saniiro Books's 15.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

do!book ships an update every 2 months, Saniiro Books every 4 months. The most recent releases landed on October 26, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | do!book | Saniiro Books |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 5 MB | 35 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Digital Office  Japan  Inc.](https://appshunter.io/developer/348581782) | [Saniiro Technologies Pvt. Ltd](https://appshunter.io/developer/1745668367) |

## What reviewers say

### do!book

[App page](https://appshunter.io/ios/app/dobook/id1459068800)

**Features:** macOS Compatibility

**In-app purchases:** none


### Saniiro Books

[App page](https://appshunter.io/ios/app/saniiro-books/id6502511199)

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

**In-app purchases:** none


## Frequently asked questions

### Is do!book free?

do!book is free to download, with no in-app purchases.

### Is Saniiro Books free?

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

### Do do!book or Saniiro Books have ads?

Neither do!book nor Saniiro Books shows ads.

### Which is updated more often, do!book or Saniiro Books?

do!book ships an update every 2 months, and Saniiro Books every 4 months. Most recently, do!book was updated on October 26, 2026 and Saniiro Books on November 8, 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.*