# NGM Flasher vs simos.app

The clearest difference is in-app purchases: NGM Flasher at none against simos.app's 3. simos.app's advantage is iOS requirement (17.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

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

NGM Flasher ships an update weekly, simos.app every 6 days. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | NGM Flasher | 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 | Weekly | **Every 6 days** |
| Monetization | — | Free |
| Size | 23 MB | 6 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NGM App GmbH](https://appshunter.io/developer/1703042509) | [Tycho Sebastian Holzer](https://appshunter.io/developer/1882338941) |

## What reviewers say

### NGM Flasher

[App page](https://appshunter.io/ios/app/ngm-flasher/id6462794072)

**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. 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 (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 NGM Flasher free?

NGM Flasher 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 NGM Flasher or simos.app have ads?

Neither NGM Flasher nor simos.app shows ads.

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

NGM Flasher ships an update weekly, and simos.app every 6 days. Most recently, NGM Flasher was updated on October 7, 2026 and simos.app on October 18, 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.*