# WatchCat Step Pet vs Aquarium Harmony

The clearest difference is in-app purchases: WatchCat Step Pet at none against Aquarium Harmony's 3. WatchCat Step Pet also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Aquarium Harmony sells 3 in-app purchases, starting at $4.99 per month. WatchCat Step Pet asks for nothing beyond the download.

## The numbers

| Metric | WatchCat Step Pet | Aquarium Harmony |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 6 weeks |
| Size | 75 MB | 15 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [帆 胡](https://appshunter.io/developer/1699269059) | [Georgiy Gorokhov](https://appshunter.io/developer/1806278466) |

## What reviewers say

### WatchCat Step Pet

[App page](https://appshunter.io/ios/app/watchcat-step-pet/id6786098094)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Aquarium Harmony

[App page](https://appshunter.io/ios/app/aquarium-harmony/id6790428231)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium — Monthly | $4.99 | per month |
| Premium — Annual | $19.99 | per year |
| Premium — Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is WatchCat Step Pet free?

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

### Is Aquarium Harmony free?

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

### Do WatchCat Step Pet or Aquarium Harmony have ads?

Aquarium Harmony shows ads; WatchCat Step Pet does not.

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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.*