# TuningHost vs simos.app

The clearest difference is in-app purchases: TuningHost at none against simos.app's 3. simos.app's advantage is update cadence (weekly vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. simos.app sells 3 one-off in-app purchases. TuningHost asks for nothing beyond the download.

TuningHost ships an update fortnightly, simos.app weekly. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | TuningHost | simos.app |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/simosapp/id6760018423/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | — | Free |
| Size | 8 MB | 7 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tuning Host SL GmbH](https://appshunter.io/developer/1775790000) | [Tycho Sebastian Holzer](https://appshunter.io/developer/1882338941) |

## What reviewers say

### TuningHost

[App page](https://appshunter.io/ios/app/tuninghost/id6737291958)

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

**In-app purchases:** none


### simos.app

[App page](https://appshunter.io/ios/app/simosapp/id6760018423)

This tool provides diagnostic, data logging, and flashing capabilities for VAG petrol engines with specific Simos ECUs. It allows real-time monitoring of engine parameters, ECU identification, and analysis of recorded data through multi-channel graphs. Users can also update their ECU with stock or custom tunes.

**Highlights:** Real-time ECU parameter logging, ECU identification and info, Multi-channel log analysis graphs, ECU and TCU flashing, Support for Simos 18.x and 12.1 ECUs

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| App VIN Unlock | $17.99 | one-time |
| Wizard: Pops & Bangs - Single Bin | $17.99 | one-time |
| Stage 1 Bin | $179.99 | one-time |


## Frequently asked questions

### Is TuningHost free?

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

### Is simos.app free?

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

### Do TuningHost or simos.app have ads?

Neither TuningHost nor simos.app shows ads.

### Which is updated more often, TuningHost or simos.app?

TuningHost ships an update fortnightly, and simos.app weekly. Most recently, TuningHost was updated on October 30, 2026 and simos.app on November 6, 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.*