simos.app
Tycho Sebastian Holzer
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About this app
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
What's new
Version 1.9.17 · Nov 9, 2026
- AQ250 / AQ450 / AQ300 (Aisin AW): CAL and full flashing (beta), 09G and 09S - Live: digital tiles are as wide as the gauges; long-press a tile to show it as gauge, number or bar - Live: Gear shows as a number by default; MIN and MAX sit on one line - PID CSV: new Display column saves each PID's gauge, number or bar style - PID CSV: the category column now also renames built-in PIDs - Auto logging: pre-trigger buffer (0-20 s), new gear change and knock triggers - DQ250 MQB CAL flash checks box code and ASW version against the TCU - Simos 19 (SCR / SCQ): HSL logging; Mode 22 adds Vehicle Speed, MAP and TPS - New HSL PID: EGT (modelled exhaust gas temperature before the turbo)
In-app purchases
The most popular purchases on the App Store.
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