# KEYSOL vs Engine Radio Online

The clearest difference is ads: KEYSOL at none against Engine Radio Online's shown. KEYSOL also leads on iOS requirement (10.0 vs 15.1). 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.

KEYSOL ships an update every 14 months, Engine Radio Online every 8 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | KEYSOL | Engine Radio Online |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Every 8 months** |
| Monetization | Free | — |
| Size | 158 MB | 38 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vivaldi S.R.L.](https://appshunter.io/developer/1266604469) | [BVmedia](https://appshunter.io/developer/1218201375) |

## What reviewers say

### KEYSOL

[App page](https://appshunter.io/ios/app/keysol/id1266604470)

Stream and control your music playlists from your mobile device. Synchronize music across multiple devices or enjoy independent playback in different rooms. Supports various audio formats and internet radio sources.

**Highlights:** Playlist playback and control, Multi-device synchronization, Independent room audio, Support for Airplay, DLNA, WiFi DIRECT, Wide range of audio format support, Internet radio and local file streaming, NAS streaming

**Features:** macOS Compatibility

**In-app purchases:** none


### Engine Radio Online

[App page](https://appshunter.io/ios/app/engine-radio-online/id6473288981)

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

**In-app purchases:** none


## Frequently asked questions

### Is KEYSOL free?

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

### Is Engine Radio Online free?

Engine Radio Online is free to download, with no in-app purchases.

### Do KEYSOL or Engine Radio Online have ads?

Engine Radio Online shows ads; KEYSOL does not.

### Which is updated more often, KEYSOL or Engine Radio Online?

KEYSOL ships an update every 14 months, and Engine Radio Online every 8 months. Most recently, KEYSOL was updated on November 3, 2026 and Engine Radio Online on November 4, 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.*