# PetMic vs Uchinoko Diary

The clearest difference is in-app purchases: PetMic at none against Uchinoko Diary's 1. PetMic also leads on ads (none vs shown). Uchinoko Diary's advantage is update cadence (every 4 days vs every 2 weeks) and device support (3 vs 1). On price there is nothing between them.

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

PetMic ships an update every 2 weeks, Uchinoko Diary every 4 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | PetMic | Uchinoko Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 2 MB | 229 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Heather Kim](https://appshunter.io/developer/1877817879) | [Ota Sato](https://appshunter.io/developer/1895370516) |

## What reviewers say

### PetMic

[App page](https://appshunter.io/ios/app/petmic/id6760432548)

**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 PetMic free?

PetMic 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 PetMic or Uchinoko Diary have ads?

Uchinoko Diary shows ads; PetMic does not.

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

PetMic ships an update every 2 weeks, and Uchinoko Diary every 4 days. Most recently, PetMic was updated on October 25, 2026 and Uchinoko Diary on October 25, 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.*