# 日記ビュアー：人生を見える化 vs Challenge Log

The clearest difference is update cadence: Challenge Log at fortnightly against 日記ビュアー：人生を見える化's monthly. 日記ビュアー：人生を見える化's advantage is iOS requirement (9.0 vs 15.0). 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.

日記ビュアー：人生を見える化 ships an update monthly, Challenge Log fortnightly. The most recent releases landed on October 25, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 日記ビュアー：人生を見える化 | Challenge Log |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Size | 125 MB | 91 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hikaru Takenaka](https://appshunter.io/developer/1539298266) | [YOSHIKI KOKUBO](https://appshunter.io/developer/1496137532) |

## What reviewers say

### 日記ビュアー：人生を見える化

[App page](https://appshunter.io/ios/app/id1543514073)

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

**In-app purchases:** none


### Challenge Log

[App page](https://appshunter.io/ios/app/challenge-log/id6748856273)

**In-app purchases:** none


## Frequently asked questions

### Is 日記ビュアー：人生を見える化 free?

日記ビュアー：人生を見える化 is free to download, with no in-app purchases.

### Is Challenge Log free?

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

### Do 日記ビュアー：人生を見える化 or Challenge Log have ads?

Both 日記ビュアー：人生を見える化 and Challenge Log show ads.

### Which is updated more often, 日記ビュアー：人生を見える化 or Challenge Log?

日記ビュアー：人生を見える化 ships an update monthly, and Challenge Log fortnightly. Most recently, 日記ビュアー：人生を見える化 was updated on October 25, 2026 and Challenge Log on October 6, 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.*