# 猫日誌 vs PetDiary

The clearest difference is in-app purchases: 猫日誌 at none against PetDiary's 3. 猫日誌 also leads on update cadence (monthly vs every 3 months) and device support (3 vs 1). PetDiary's advantage is ads (none vs shown). On price there is nothing between them.

Both are free to download. PetDiary sells 3 one-off in-app purchases. 猫日誌 asks for nothing beyond the download.

猫日誌 ships an update monthly, PetDiary every 3 months. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 猫日誌 | PetDiary |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 3 months |
| Size | 59 MB | 13 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Takaya Shono](https://appshunter.io/developer/891668666) | [jiaquan zhou](https://appshunter.io/developer/1312353857) |

## What reviewers say

### 猫日誌

[App page](https://appshunter.io/ios/app/id6468939205)

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

**In-app purchases:** none


### PetDiary

[App page](https://appshunter.io/ios/app/petdiary-pet-life-tracker/id6763555528)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Member | $0.99 | one-time |
| Annual membership | $4.99 | one-time |
| Lifetime Member | $9.99 | one-time |


## Frequently asked questions

### Is 猫日誌 free?

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

### Is PetDiary free?

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

### Do 猫日誌 or PetDiary have ads?

猫日誌 shows ads; PetDiary does not.

### Which is updated more often, 猫日誌 or PetDiary?

猫日誌 ships an update monthly, and PetDiary every 3 months. Most recently, 猫日誌 was updated on October 9, 2026 and PetDiary on October 24, 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.*