# simos.app vs MotozaApp

The clearest difference is update cadence: simos.app at every 4 days against MotozaApp's every 11 days. 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.

simos.app ships an update every 4 days, MotozaApp every 11 days. The most recent releases landed on September 12, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | simos.app | MotozaApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/simosapp/id6760018423/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 11 days |
| Monetization | Free | — |
| Size | 6 MB | 43 MB |
| Requires iOS | **17.6** | 18.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Tycho Sebastian Holzer](https://appshunter.io/developer/1882338941) | [Motoza Performance](https://appshunter.io/developer/6788230521) |

## What reviewers say

### 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. Monitor real-time engine parameters, analyze recorded sessions with graphs, and update your ECU with stock or custom tunes.

**Highlights:** Real-time ECU parameter monitoring, Live data logging via Bluetooth LE, ECU identification (software/calibration IDs), Multi-channel graph analysis of logged sessions, ECU and TCU flashing (stock and custom tunes), Support for Simos 18.x and 12.1 ECUs

**In-app purchases:** none


### MotozaApp

[App page](https://appshunter.io/ios/app/motozaapp/id6788230519)

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

**In-app purchases:** none


## Frequently asked questions

### Is simos.app free?

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

### Is MotozaApp free?

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

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

Neither simos.app nor MotozaApp shows ads.

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

simos.app ships an update every 4 days, and MotozaApp every 11 days. Most recently, simos.app was updated on September 12, 2026 and MotozaApp 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.*