Check Engine Chat

Offline Car Diagnostics AI

Free · In‑App Purchases

Ask any car question. Record your engine. Get instant, accurate answers from an AI that runs entirely on your iPhone. No signal. No subscriptions. No data collected. Your AI mechanic, running entirely on your phone. Ask any car question and get instant, accurate answers grounded in a curated automotive database covering 400+ vehicle models from 1976 to 2025. Oil specs, torque values, tire pressure, transmission fluid, spark plug gaps, DIY repair guides with tool lists and difficulty ratings, and symptom-based diagnostic troubleshooting. AUDIO DIAGNOSTICS (Pro) Record your engine sound. The AI analyzes the audio and identifies the problem such as knock, turbo failure, belt squeal, timing chain wear, transmission whine, VTEC rattle, and more. All processed on-device in seconds. PRIVACY FIRST Everything runs on your iPhone. No cloud servers. No accounts. No analytics. No tracking. Works in airplane mode. Your car problems are yours. FEATURES - Vehicle spec lookup (oil, torque, tire pressure, fluids) - DIY repair guides with tool lists and difficulty ratings - Symptom based diagnostic reasoning - Audio engine sound diagnosis - Aftermarket and mod guidance - Conversation history + Generate Report - Works fully offline after setup Requires iPhone 15. Built by car enthusiasts.

Ratings & Reviews

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Improved model reasoning performance.

Version 3.13.1

The developer, Yao Vah Saechao, 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 Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based 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

    Seller
    • Yao Vah Saechao
    Size
    • 3.9 GB
    Category
    • Utilities
    Compatibility
    Requires iOS 26.2 or later.
    • iPhone
      Requires iOS 26.2 or later.
    • iPad
      Requires iPadOS 26.2 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © @2026 Check Engine Chat
  • Developer Website
  • Privacy Policy

    • More by Yao Vah Saechao

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