No special hardware required. Just describe your problem and Wrench diagnoses it. Want to go deeper? Add a $20 Bluetooth adapter for live data and full scanning.
No adapter? No problem. Wrench works with or without hardware.
Don't have an OBD adapter? Don't want one? You don't need it.
Open Wrench on your phone and describe what's happening:
"My 2019 Honda Civic makes a grinding noise when I brake"
"Check engine light came on, car feels sluggish"
"What does code P0420 mean on my Camry?"
The AI asks follow-up questions, cross-references your vehicle's known issues, and gives you a plain-English diagnosis with next steps.
Perfect for:
Add a $15-50 Bluetooth OBD adapter and unlock everything.
Wrench connects directly to your car's computer and reads live data, scans every module, and lets the AI analyze what's actually happening in real-time.
🟢 Connected to 2018 Ram 1500
✅ 8 modules scanned | 2 codes found
📊 Live data streaming at 2 updates/sec
🧠 AI analyzing fuel trims in real-time...
You get:
Start without hardware, upgrade when you're ready.
Most people start by chatting with the AI. When they see how good it is, they grab a $20 adapter to unlock the full experience.
Three things. That's it.
iPhone, iPad, Android, Samsung tablet — if it has a browser, it runs Wrench. No app store download needed. It's a web app that works like a native app.
Plugs into the port under your dash (every car since 1996 has one). We recommend the OBDLink MX+ ($100 for enhanced data) or any cheap ELM327 adapter ($15-25) to get started.
OBD-II is standard on every car, truck, and SUV sold in the US since 1996. Wrench works with all of them — domestic, import, gas, diesel, hybrid.
Simple setup that works every time.
Plug your Bluetooth OBD adapter into the OBD-II port under the dash. It's usually below the steering wheel on the driver's side. The adapter powers on automatically from the car's battery.
Open wrenchtech.ai on your phone or tablet. Tap 'Connect' — your adapter shows up in the Bluetooth list. Tap it. Done. You're connected.
That's it. Wrench scans all 8 modules automatically, reads every code, and the AI is ready to help you figure out what's wrong. Talk to it, type to it, or just let it watch your live data.
A walkthrough of the complete diagnosis flow.
Wrench talks to every computer in the vehicle — not just the engine. PCM, Transmission, ABS, Airbags, Body Control, HVAC, TPMS, Instrument Cluster. Finds every stored and pending code.
Not just "P0171 — System Too Lean." Wrench tells you WHAT it means, HOW serious it is, WHETHER it's safe to drive, and WHAT usually fixes it based on your specific vehicle.
This is where Wrench is different from every other scanner. The AI watches your live sensor data in real-time and spots the patterns that point to the real problem — not just the code, but the cause.
Wrench doesn't guess. It tells you how confident it is: POSSIBLE (needs more data) → LIKELY (strong evidence) → CONFIRMED (multiple data points agree). No premature parts recommendations. No shotgun diagnostics.
Greasy hands? Talk to it. Have a scan tool screen you want analyzed? Take a photo. Wrench understands both.
Everything you need to know to get started.
Free during beta. No credit card. Connect and diagnose in 60 seconds.
🔧 Start Free Beta →