# Failure Journal vs 逆算日記

The clearest difference is in-app purchases: Failure Journal at none against 逆算日記's 1. Failure Journal also leads on ads (none vs shown) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. 逆算日記 sells 1 one-off in-app purchase. Failure Journal asks for nothing beyond the download.

## The numbers

| Metric | Failure Journal | 逆算日記 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Size | 24 MB | 5 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YUYA ONO](https://appshunter.io/developer/1747284503) | [hirokazu murabe](https://appshunter.io/developer/894364772) |

## What reviewers say

### Failure Journal

[App page](https://appshunter.io/ios/app/failure-journal/id6757675466)

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

**In-app purchases:** none


### 逆算日記

[App page](https://appshunter.io/ios/app/id6791003196)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $0.49 | one-time |


## Frequently asked questions

### Is Failure Journal free?

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

### Is 逆算日記 free?

逆算日記 is free to download, with in-app purchases available.

### Do Failure Journal or 逆算日記 have ads?

逆算日記 shows ads; Failure Journal does not.

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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.*