# Katedra vs Ataria

The clearest difference is ads: Katedra at none against Ataria's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

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

Katedra ships an update every 3 months, Ataria every 2 months. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Katedra | Ataria |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 31 MB | 51 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Universidad del País Vasco - Euskal Herriko Unibertsitatea](https://appshunter.io/developer/1207736716) | [Tokikom](https://appshunter.io/developer/1067651884) |

## What reviewers say

### Katedra

[App page](https://appshunter.io/ios/app/katedra/id1207736717)

**In-app purchases:** none


### Ataria

[App page](https://appshunter.io/ios/app/ataria/id6737913533)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Katedra free?

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

### Is Ataria free?

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

### Do Katedra or Ataria have ads?

Ataria shows ads; Katedra does not.

### Which is updated more often, Katedra or Ataria?

Katedra ships an update every 3 months, and Ataria every 2 months. Most recently, Katedra was updated on September 29, 2026 and Ataria on October 10, 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.*