Diag Drive: AI Car Mechanic

OBD scanner & fault code help

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Check-engine light on? Find out why in seconds. Describe the problem, snap a photo or record the noise and get a step-by-step fix for your exact car. Stop guessing. Stop overpaying. Diag Drive is the AI master mechanic in your pocket: tell it what your car is doing and get a clear, step-by-step fix written for your exact make, model and engine. DESCRIBE IT, SNAP IT OR RECORD IT • Type the symptom in plain English: "rough idle when cold", "clunk over bumps", "squeal when braking". • Photo inspection: point your camera at a leak, a worn part or a dashboard warning light. • Noise diagnosis: record up to 15 seconds of a knock, tick, whine or rattle and let the AI listen. ANSWERS THAT FIT YOUR CAR • Knows your vehicle, the tools in your toolbox and what's already been replaced. • Gives the most likely cause first, then the next suspects, then the checks to confirm it. • Flags anything safety-critical: brakes, steering, airbags, fuel leaks and EV high voltage. OBD-II SCANNER (BETA) Plug in a Bluetooth LE or Wi-Fi ELM327 adapter (OBDLink, Vgate vLinker, Veepeak and more) and: • Read and clear engine fault codes: stored, pending and permanent. • See the freeze-frame data saved the moment the fault happened. • Watch live data: RPM, speed, coolant temperature, load, boost, fuel trims and battery voltage. • Check readiness monitors before your MOT or inspection. • Record a drive and let the AI analyse the log. • Ask the AI to explain all your codes together. Works on most petrol cars from 2001 and diesels from 2004. No adapter yet? Try the built-in demo. YOUR GARAGE • Add vehicles by VIN or by hand. • Keep service history and get reminders for MOT, tax, insurance and servicing. TOOLS THAT SAVE YOU MONEY • Job estimator: DIY vs garage cost, parts and tools before you start. • Buyer's companion: what to check on a used car before you hand over the cash. • Fault code library with 340+ codes, works offline. • Pre-flight walk-round check, vibration analyser, hands-free voice mode, parts log and unit converter. START FREE • 3 free AI diagnoses, no account needed. • Earn more by watching a short ad, or grab a 5-credit pack. • DIY Enthusiast (weekly): 25 AI diagnoses a week, photo and noise analysis, no ads. • Pro Mobile Mechanic (weekly): unlimited AI diagnoses plus wiring diagrams, pinouts and wire colours. Sign in with Apple or email to keep your credits and subscription on every device. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple ID. Manage or cancel any time in Settings › Apple ID › Subscriptions. Diag Drive gives guidance only. Always follow your manufacturer's instructions and have safety-critical work checked by a qualified mechanic. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://api.motorlane.uk/privacy

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The developer, REECE ALAN HORWOOD, 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 Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Contact Info
    • User Content
    • Identifiers

  • Data Not Linked to You

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

    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

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

Accessibility

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Information

Seller
REECE ALAN HORWOOD
Size
9.3 MB
Category
Utilities
Compatibility
Requires iOS 26.5 or later.
  • iPhone
    Requires iOS 26.5 or later.
  • Mac
    Requires macOS 26.5 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.5 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
  • 5 AI Credits $0.99
  • DIY Enthusiast $1.99
  • Pro Mobile Mechanic $4.99
  • Learn More
Copyright
© 2026 Reece Horwood
  • Developer Website
  • Privacy Policy

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