Check Engine Chat
Offline Car Diagnostics AI
Free · In‑App Purchases
On-Device AI Mechanic Assistant on your iPhone.
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 with at least 6gb ram.
Built by car enthusiasts.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Audio Diagnostic sound library up from 13 categories to 23.
Improved Audio Diagnostics accuracy.
Improved on-device model performance.
Ask general car questions.
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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yao Vah Saechao
- Size
- 2.9 GB
- Category
- Utilities
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - iPad
Requires iPadOS 26.2 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Audio Diagnostics Pro $4.99
- Copyright
- © @2026 Check Engine Chat