# 観察日記 vs LEAF MEMO

The clearest difference is ads: 観察日記 at none against LEAF MEMO's shown. 観察日記 also leads on iOS requirement (9.0 vs 15.5). On price, update cadence, 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.

観察日記 ships an update weekly, LEAF MEMO every 2 weeks. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 観察日記 | LEAF MEMO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 2 weeks |
| Size | 53 MB | 38 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yutaka Tajika](https://appshunter.io/developer/1063102537) | [NAOKI TAKESHITA](https://appshunter.io/developer/511004463) |

## What reviewers say

### 観察日記

[App page](https://appshunter.io/ios/app/id1063102538)

**Features:** macOS Compatibility

**In-app purchases:** none


### LEAF MEMO

[App page](https://appshunter.io/ios/app/leaf-memo/id6746084097)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 観察日記 free?

観察日記 is free to download, with no in-app purchases.

### Is LEAF MEMO free?

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

### Do 観察日記 or LEAF MEMO have ads?

LEAF MEMO shows ads; 観察日記 does not.

### Which is updated more often, 観察日記 or LEAF MEMO?

観察日記 ships an update weekly, and LEAF MEMO every 2 weeks. Most recently, 観察日記 was updated on October 26, 2026 and LEAF MEMO on October 28, 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.*