# Oto Diary vs Ichigyo

Oto Diary and Ichigyo are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Oto Diary sells 1 one-off in-app purchase and Ichigyo sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Oto Diary ships an update every 6 weeks, Ichigyo every 3 weeks. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Oto Diary | Ichigyo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 2 MB | 271 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [torankirite](https://appshunter.io/developer/1883564850) | [Ryo Uejima](https://appshunter.io/developer/6795849864) |

## What reviewers say

### Oto Diary

[App page](https://appshunter.io/ios/app/oto-diary/id6760734574)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound Diary Premium | $3.99 | one-time |


### Ichigyo

[App page](https://appshunter.io/ios/app/ichigyo-one-line-diary/id6797876611)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lamplit Study | $3.59 | one-time |
| Seaside Window | $3.59 | one-time |
| Lakeside Cabin | $3.59 | one-time |
| New Year Room | $3.59 | one-time |
| Forest Greenhouse | $3.59 | one-time |
| Halloween Study | $3.59 | one-time |
| Christmas Night | $3.59 | one-time |
| Rainy Street Study | $3.59 | one-time |
| Unlock Journal Features | $4.99 | one-time |


## Frequently asked questions

### Is Oto Diary free?

Oto Diary is free to download, with in-app purchases available.

### Is Ichigyo free?

Ichigyo is free to download, with in-app purchases available.

### Do Oto Diary or Ichigyo have ads?

Neither Oto Diary nor Ichigyo shows ads.

### Which is updated more often, Oto Diary or Ichigyo?

Oto Diary ships an update every 6 weeks, and Ichigyo every 3 weeks. Most recently, Oto Diary was updated on November 9, 2026 and Ichigyo on November 10, 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.*