# Prusa vs O

The clearest difference is update cadence: O at every 4 days against Prusa's every 5 weeks. Prusa's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

Prusa ships an update every 5 weeks, O every 4 days. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Prusa | O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (117 ratings)](https://appshunter.io/ios/app/prusa/id6477531937/reviews)** | — |
| Number of ratings | **117** | — |
| Positive reviews | 50.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 102 MB | 57 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Prusa Research a.s.](https://appshunter.io/developer/1729557743) | [PUFin ID A/S](https://appshunter.io/developer/1614643757) |

## What reviewers say

### Prusa

[App page](https://appshunter.io/ios/app/prusa/id6477531937)

Monitor and manage your 3D printers remotely. Control print parameters, receive notifications for print status, and integrate with model repositories and slicing software. Easily add new printers and cameras, with options for cloud or on-premises storage.

**Highlights:** Real-time printer overview, Remote print management, Temperature, speed, flow control, Push notifications, Printables.com integration, EasyPrint slicing integration, NFC printer setup

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

**In-app purchases:** none

**What reviewers like**

- 🔔 Push notifications for finished prints
- 🔍 Ability to monitor printers and print status
- 🌟 Overall great user experience and functionality

**What reviewers complain about**

- 🐞 Bugs and glitches, including issues with offline printers
- 📷 Lack of camera support and monitoring
- 🔍 Suboptimal design for single-printer users
- 🔧 Missing features compared to the website, such as file uploads and statistics


### O

[App page](https://appshunter.io/ios/app/o-key-authenticator/id6776659466)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Prusa free?

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

### Is O free?

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

### Do Prusa or O have ads?

Neither Prusa nor O shows ads.

### Which is updated more often, Prusa or O?

Prusa ships an update every 5 weeks, and O every 4 days. Most recently, Prusa was updated on October 7, 2026 and O 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.*