# Petra vs Catalyst Art

The clearest difference is iOS requirement: Petra at 11.0 against Catalyst Art's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Petra ships an update every 5 days, Catalyst Art every 9 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Petra | Catalyst Art |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Size | 53 MB | 15 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [EQUAL INFOTECH PRIVATE LIMITED](https://appshunter.io/developer/1534260659) | [Kahl Wilfert](https://appshunter.io/developer/6781067814) |

## What reviewers say

### Petra

[App page](https://appshunter.io/ios/app/petra-art/id6502698422)

**Features:** macOS Compatibility

**In-app purchases:** none


### Catalyst Art

[App page](https://appshunter.io/ios/app/catalyst-art/id6781131979)

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

**In-app purchases:** none


## Frequently asked questions

### Is Petra free?

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

### Is Catalyst Art free?

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

### Do Petra or Catalyst Art have ads?

Neither Petra nor Catalyst Art shows ads.

### Which is updated more often, Petra or Catalyst Art?

Petra ships an update every 5 days, and Catalyst Art every 9 days. Most recently, Petra was updated on November 4, 2026 and Catalyst Art on October 31, 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.*