# do!bookⅡ vs Motus9

The clearest difference is update cadence: Motus9 at every 2 weeks against do!bookⅡ's every 2 months. do!bookⅡ's advantage is iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

do!bookⅡ ships an update every 2 months, Motus9 every 2 weeks. The most recent releases landed on October 17, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | do!bookⅡ | Motus9 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 21 MB | 26 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Digital Office  Japan  Inc.](https://appshunter.io/developer/348581782) | [Motus9 LLC](https://appshunter.io/developer/1714614040) |

## What reviewers say

### do!bookⅡ

[App page](https://appshunter.io/ios/app/dobook/id599472647)

**Features:** macOS Compatibility

**In-app purchases:** none


### Motus9

[App page](https://appshunter.io/ios/app/motus9/id6470996494)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is do!bookⅡ free?

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

### Is Motus9 free?

Motus9 is free to download, with no in-app purchases.

### Do do!bookⅡ or Motus9 have ads?

Neither do!bookⅡ nor Motus9 shows ads.

### Which is updated more often, do!bookⅡ or Motus9?

do!bookⅡ ships an update every 2 months, and Motus9 every 2 weeks. Most recently, do!bookⅡ was updated on October 17, 2026 and Motus9 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.*