Gwiryn: Car Diagnostic AI

Gwiryn turns your smartphone into a powerful car diagnostic tool. Connect a Bluetooth OBD2 dongle, read live engine data and fault codes, and let AI explain exactly what's happening — in plain English.

No mechanic jargon. No guesswork.

━━━ HOW IT WORKS ━━━

1. Plug In — Connect an ELM327-compatible Bluetooth OBD2 adapter to the diagnostic port under your dashboard.
2. Connect — Open Gwiryn, scan for nearby Bluetooth devices, and tap to pair with your dongle.
3. Diagnose — Read live sensor data, scan for fault codes, and chat with AI about your car's health.

━━━ KEY FEATURES ━━━

Live OBD2 Data
Monitor real-time engine parameters — RPM, coolant temperature, intake pressure, fuel trims, throttle position, and more — updated live from your vehicle's ECU.

Fault Code Reader
See every active and stored DTC directly on your phone. Basic and Pro subscribers also get instant AI explanations — what the code means, what likely caused it, and what to do next.

AI Diagnostics Chat
Have a full conversation with AI using your vehicle's actual live data as context. Describe a symptom, ask why a sensor is reading unexpectedly, or get guidance before visiting a mechanic.

Live Graphs & History
Tap any parameter to view its live graph. Adjust the time axis to investigate readings from a specific point in your drive.

OBD2 Port Finder
Not sure where your OBD2 port is? Gwiryn shows you exactly where to find it for your specific vehicle.

Vehicle Compatibility Check
Search your make and model to see what your vehicle exposes over OBD2 before buying an adapter.

━━━ PLANS ━━━

Free — No payment required.
• Live OBD2 data & fault codes
• Vehicle compatibility check
• OBD2 port finder

Basic — Subscription.
• Everything in Free
• AI fault code explanations
• AI diagnostic chat
• Monthly message allowance

Pro — Subscription.
• Everything in Basic
• Much higher message limits
• Advanced AI models

━━━ REQUIREMENTS ━━━

• An ELM327-compatible Bluetooth OBD2 adapter (compatibility may vary — not all adapters are guaranteed to work)
• A vehicle with a standard OBD2 port (most cars 2001 onwards)
• Android 8.0 or higher with Bluetooth 4.0 (BLE)

━━━

Gwiryn is for informational purposes only and is not a substitute for professional mechanical advice. Never use the app while driving.

Recent changes:
Easier vehicle setup: Describe your car in your own words, for example "2015 Ford Focus Titanium diesel 1.6 manual". The app works out the make, model, year, fuel type, engine size, transmission and trim, then shows you a summary to confirm before saving.

Better diagnostics: Knowing your exact vehicle (year, fuel type and engine) lets the AI give more accurate, vehicle-specific advice.