# todo vs Book Flip Notes

The clearest difference is in-app purchases: todo at none against Book Flip Notes's 1. todo also leads on iOS requirement (15.5 vs 17.0). Book Flip Notes's advantage is device support. On price there is nothing between them.

Both are free to download. Book Flip Notes sells 1 one-off in-app purchase. todo asks for nothing beyond the download.

## The numbers

| Metric | todo | Book Flip Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 11 days |
| Size | 21 MB | 72 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | — | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [SHIGERU ARAKI](https://appshunter.io/developer/1506645360) | [lecoo](https://appshunter.io/developer/1630534948) |

## What reviewers say

### todo

[App page](https://appshunter.io/ios/app/todo-diary/id1636143899)

**In-app purchases:** none


### Book Flip Notes

[App page](https://appshunter.io/ios/app/book-flip-notes/id6782423238)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $0.99 | one-time |


## Frequently asked questions

### Is todo free?

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

### Is Book Flip Notes free?

Book Flip Notes is free to download, with in-app purchases available.

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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.*