# UNDOK vs Rytha

The clearest difference is in-app purchases: UNDOK at none against Rytha's 1. UNDOK also leads on iOS requirement (12.0 vs 18.0). Rytha's advantage is update cadence (every 4 days vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Rytha sells 1 one-off in-app purchase. UNDOK asks for nothing beyond the download.

UNDOK ships an update every 6 weeks, Rytha every 4 days. The most recent releases landed on October 15, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | UNDOK | Rytha |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (244 ratings)](https://appshunter.io/ios/app/undok/id940349372/reviews)** | — |
| Number of ratings | **244** | — |
| Positive reviews | 55.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 45 MB | 3 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Frontier Smart Technologies Ltd](https://appshunter.io/developer/386290316) | [Thomas Stahmer](https://appshunter.io/developer/6799920369) |

## What reviewers say

### UNDOK

[App page](https://appshunter.io/ios/app/undok/id940349372)

Easily connect and control your compatible SmartRadio or connected speaker. Set up new devices, manage your home audio system, and access various audio sources like internet radio and streaming services.

**Highlights:** Wireless network connection, Device setup and management, Remote control of audio functions, Source selection (Internet Radio, DAB, Bluetooth, etc.), Volume and playback control, Access to presets, Spotify Connect integration

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

**In-app purchases:** none


### Rytha

[App page](https://appshunter.io/ios/app/rytha/id6811962385)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rytha Premium | $5.99 | one-time |


## Frequently asked questions

### Is UNDOK free?

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

### Is Rytha free?

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

### Do UNDOK or Rytha have ads?

Neither UNDOK nor Rytha shows ads.

### Which is updated more often, UNDOK or Rytha?

UNDOK ships an update every 6 weeks, and Rytha every 4 days. Most recently, UNDOK was updated on October 15, 2026 and Rytha on September 22, 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.*