# PrayDOS vs Altær

The clearest difference is update cadence: Altær at every 3 days against PrayDOS's fortnightly. PrayDOS's advantage is iOS requirement (15.0 vs 17.0). On price, ads, 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.

PrayDOS ships an update fortnightly, Altær every 3 days. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | PrayDOS | Altær |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Size | 31 MB | 182 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gregory Johnston](https://appshunter.io/developer/1502034357) | [Michael Entrekin](https://appshunter.io/developer/1554925634) |

## What reviewers say

### PrayDOS

[App page](https://appshunter.io/ios/app/praydos/id6451497427)

**Features:** Vision Pro support

**In-app purchases:** none


### Altær

[App page](https://appshunter.io/ios/app/altr/id6759136313)

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

**In-app purchases:** none


## Frequently asked questions

### Is PrayDOS free?

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

### Is Altær free?

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

### Do PrayDOS or Altær have ads?

Neither PrayDOS nor Altær shows ads.

### Which is updated more often, PrayDOS or Altær?

PrayDOS ships an update fortnightly, and Altær every 3 days. Most recently, PrayDOS was updated on September 8, 2026 and Altær on September 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.*