simos.app vs MotozaApp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
simos.app
This tool provides diagnostic, data logging, and flashing capabilities for specific VAG petrol engine ECUs. It allows real-time monitoring of engine parameters, ECU identification, and analysis of recorded sessions through multi-channel graphs. Users can also update their ECU with stock or custom tunes.
- Real-time ECU parameter logging
- ECU identification
- Multi-channel graph analysis
- ECU and TCU flashing
- Bluetooth LE connection
- Support for Simos 18.x and 12.1 ECUs
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simos.app is a diagnostic, data logging and flashing tool built specifically for VAG petrol engines running Simos 18.1, 18.2, 18.6, 18.10 and Simos 12.1 ECUs. The platforms found in most modern TSI and TFSI engines across Audi, VW, Škoda, SEAT, Cupra and Porsche. LIVE DATA LOGGING Read ECU parameters directly in real time. Monitor boost pressure, injection timing, lambda, temperatures, torque and more at high sample rates over a Bluetooth LE connection. ECU IDENTIFICATION Read software versions, calibration IDs and hardware info straight from the control unit. LOG ANALYSIS Visualize recorded sessions with multi-channel graphs. Spot correlations between parameters without leaving the app. FLASHING Update your ECU and TCU to the latest version for your vehicle or flash a custom tune. Full features available for Simos 18.1/18.10 and 18.6. Flashing stock files or pre-unlocked ecus for Simos 18.2, 18.4, 18.41 and Simos 12.1. –– Built for enthusiasts, tuners and workshops who need more than a generic scan tool. Basic knowledge of ECU diagnostics is recommended. This app is for informational and diagnostic purposes only. Any modifications to vehicle systems are the sole responsibility of the user and must comply with local laws and regulations. –– Bluetooth LE OBD adapter required. Get yours here: https://simos.app/dongle Other compatible adapters: Macchina A0, DIY A0 clone https://github.com/Switchleg1/AMAleg require custom firmware: https://simos.app/dongle/firmware
MotozaApp
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Motoza turns your phone into a complete tuning and datalogging workstation for VW and Audi. Paired with the Motoza Bluetooth interface, it connects to your engine ECU and DSG transmission to stream live data, read and write firmware, and pull diagnostics - all wirelessly. WHAT YOU CAN DO • Live data logging - stream real-time parameters (RPM, load, boost, lambda/AFR, ignition timing, knock, temperatures and more) onto customizable dashboards with the gauges and layout you want. • Read your ECU - make a full, checksum-aware backup of your engine ECU or transmission before you change anything. • Write / flash - load a tune or modified file back to the ECU or DSG, with checksum handling built in. • Diagnostics - read stored fault codes from the connected module. • Auto-detection - Motoza identifies the connected ECU and part number on connect and loads the matching configuration automatically. SUPPORTED (VW / Audi) • Bosch ME7 engine ECUs - including the 2.5L R5 (07K) • Bosch MED9 engine ECUs • Simos18 engine ECUs • DQ250 DSG transmissions (0D9 and 02E) REQUIRES THE MOTOZA INTERFACE Motoza communicates through the Motoza Bluetooth (BLE) interface, which handles the vehicle protocols on-device and streams everything to the app. The app cannot connect to a vehicle without it.
Screenshots
Verdict
The clearest difference is in-app purchases: MotozaApp 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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. simos.app sells 3 one-off in-app purchases. MotozaApp asks for nothing beyond the download.
simos.app ships an update weekly, MotozaApp fortnightly. Both last shipped on October 31, 2026.
| Parameter | simos.app | MotozaApp |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 — better | 18.2 |
| Further details — not scored | ||
| Size | 6 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Tycho Sebastian Holzer | Motoza Performance |
In-app purchases
simos.app
- App VIN Unlock$17.99
- Wizard: Pops & Bangs - Single Bin$17.99
- Stage 1 Bin$179.99
MotozaApp
No in-app purchases









