# Prometheus Mobile STO vs Arr Control

The clearest difference is in-app purchases: Prometheus Mobile STO at none against Arr Control's 4. Prometheus Mobile STO also leads on iOS requirement (11.0 vs 16.4). Arr Control's advantage is update cadence (weekly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Arr Control sells 4 in-app purchases, starting at $0.99 per month. Prometheus Mobile STO asks for nothing beyond the download.

Prometheus Mobile STO ships an update every 3 months, Arr Control weekly. The most recent releases landed on September 14, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Prometheus Mobile STO | Arr Control |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/arr-control/id6792498398/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | — | Free |
| Size | 41 MB | 64 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [PROMETHEUS GROUP, INC.](https://appshunter.io/developer/1554172551) | [Mehmet POLAT](https://appshunter.io/developer/1874855799) |

## What reviewers say

### Prometheus Mobile STO

[App page](https://appshunter.io/ios/app/prometheus-mobile-sto/id6452803445)

**Features:** macOS Compatibility

**In-app purchases:** none


### Arr Control

[App page](https://appshunter.io/ios/app/arr-control/id6792498398)

Manage your entire media server ecosystem from a single, fast, and modern mobile app. Stay in control of downloads, requests, library monitoring, and server status from anywhere.

**Highlights:** Monitor downloads in real time, Manage Sonarr and Radarr libraries, Browse and approve Seerr requests, View Plex activity, Monitor Tautulli statistics, Check server health, Modern mobile-first interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Supporter | $0.99 | per month |
| Coffee Tip | $0.99 | one-time |
| Lunch Tip | $2.99 | one-time |
| Generous Tip | $9.99 | one-time |


## Frequently asked questions

### Is Prometheus Mobile STO free?

Prometheus Mobile STO is free to download, with no in-app purchases.

### Is Arr Control free?

Arr Control is free to download, with in-app purchases available.

### Do Prometheus Mobile STO or Arr Control have ads?

Neither Prometheus Mobile STO nor Arr Control shows ads.

### Which is updated more often, Prometheus Mobile STO or Arr Control?

Prometheus Mobile STO ships an update every 3 months, and Arr Control weekly. Most recently, Prometheus Mobile STO was updated on September 14, 2026 and Arr Control on September 15, 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.*