# Pet vs Uchinoko Diary

The clearest difference is in-app purchases: Pet at none against Uchinoko Diary's 1. Pet also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Uchinoko Diary's advantage is update cadence (every 3 days vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. Uchinoko Diary sells 1 one-off in-app purchase. Pet asks for nothing beyond the download.

Pet ships an update every 5 weeks, Uchinoko Diary every 3 days. The most recent releases landed on October 8, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Pet | Uchinoko Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Size | 66 MB | 220 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [jongseo won](https://appshunter.io/developer/1691076998) | [Ota Sato](https://appshunter.io/developer/1895370516) |

## What reviewers say

### Pet

[App page](https://appshunter.io/ios/app/pet-log/id6741676473)

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

**In-app purchases:** none


### Uchinoko Diary

[App page](https://appshunter.io/ios/app/uchinoko-diary/id6763551724)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を非表示にする | $2.99 | one-time |


## Frequently asked questions

### Is Pet free?

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

### Is Uchinoko Diary free?

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

### Do Pet or Uchinoko Diary have ads?

Uchinoko Diary shows ads; Pet does not.

### Which is updated more often, Pet or Uchinoko Diary?

Pet ships an update every 5 weeks, and Uchinoko Diary every 3 days. Most recently, Pet was updated on October 8, 2026 and Uchinoko Diary on September 27, 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.*