simos.app

VAG ECU Diagnostics & Logging

Only for iPhone

Free

iPhone

simos.app is a diagnostic, data logging and flashing tool built specifically for VAG petrol engines running Simos 18.1, 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. Only available for Simos 18.x –– 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

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- Added Simos 12 flashing support (No unlock! just official bins) - Added imperial units switch to settings - Fixed sharing dialog being bugged the first time - Fixed slow cloud bin download for flashing - Light theme fixes

Version 1.7

The developer, Tycho Sebastian Holzer, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data
    • Diagnostics

Privacy practices may vary based, for example, on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Provider
  • Holzer Consulting
Size
  • 3.7 MB
Category
  • Utilities
Compatibility
Requires iOS 17.6 or later.
  • iPhone
    Requires iOS 17.6 or later.
Languages
  • English
Age Rating
4+
Copyright
  • © 2026 Holzer Consulting Tycho Holzer
  • Privacy Policy
  • Licence Agreement