# usagiDiary vs PetSync

The clearest difference is device support: PetSync at 3 against usagiDiary's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. usagiDiary sells 4 in-app purchases, starting at $2.99 per month and PetSync sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

usagiDiary ships an update fortnightly, PetSync every 11 days. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | usagiDiary | PetSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/usagidiary/id1552918111/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 42.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 11 days** |
| Monetization | Freemium | — |
| Size | 110 MB | 107 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [RYUNOSUKE OTA](https://appshunter.io/developer/1552918113) | [MARIE MORIKAGE](https://appshunter.io/developer/1896645636) |

## What reviewers say

### usagiDiary

[App page](https://appshunter.io/ios/app/usagidiary/id1552918111)

Easily track your rabbit's daily health and care activities. Monitor food intake, weight, droppings, and more with customizable categories and a visual calendar. Get deeper insights with premium features for long-term health tracking.

**Highlights:** Daily health logging for rabbits, Customizable care categories, Calendar view of entries, Visual weight tracking chart, Support for multiple rabbits, Birthday and anniversary celebrations

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| usagi Diary Premium | $2.99 | per month |
| うさぎDiaryプロプラン | $5.99 | per month |
| usagi Diary Premium(Annual) | $19.99 | per year |
| うさぎDiaryプロプラン | $49.99 | per year |


### PetSync

[App page](https://appshunter.io/ios/app/petsync-pet-health-tracker/id6774009640)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is usagiDiary free?

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

### Is PetSync free?

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

### Do usagiDiary or PetSync have ads?

Neither usagiDiary nor PetSync shows ads.

### Which is updated more often, usagiDiary or PetSync?

usagiDiary ships an update fortnightly, and PetSync every 11 days. Most recently, usagiDiary was updated on October 24, 2026 and PetSync on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*