# PetKit vs Catalyst Performance.

The clearest difference is in-app purchases: Catalyst Performance. at none against PetKit's 3. Catalyst Performance. also leads on iOS requirement (16.4 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PetKit sells 3 in-app purchases, starting at $1.99 per month. Catalyst Performance. asks for nothing beyond the download.

PetKit ships an update every 3 months, Catalyst Performance. every 6 months. The most recent releases landed on September 19, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | PetKit | Catalyst Performance. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Size | 20 MB | 122 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Jose Angel Sanchez Castro](https://appshunter.io/developer/1613079938) | [Sutra Fitness, Inc.](https://appshunter.io/developer/914371834) |

## What reviewers say

### PetKit

[App page](https://appshunter.io/ios/app/petkit-pet-journal/id6445870272)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $14.99 | per year |
| Lifetime | $29.99 | one-time |


### Catalyst Performance.

[App page](https://appshunter.io/ios/app/catalyst-performance/id6752311065)

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

**In-app purchases:** none


## Frequently asked questions

### Is PetKit free?

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

### Is Catalyst Performance. free?

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

### Do PetKit or Catalyst Performance. have ads?

Neither PetKit nor Catalyst Performance. shows ads.

### Which is updated more often, PetKit or Catalyst Performance.?

PetKit ships an update every 3 months, and Catalyst Performance. every 6 months. Most recently, PetKit was updated on September 19, 2026 and Catalyst Performance. 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.*