A premium OBD-II scanner for Android. Plug in a Bluetooth adapter and see what your engine is doing, as it happens.
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01 · Connect
Step-by-step pairing with a Bluetooth ELM327 adapter. The app finds your car's protocol and remembers it, so next time it connects in seconds.
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02 · Live sensors
Temperatures, fuel trims, oxygen sensors, load and more, charted live. Record a drive, play it back, export it as CSV.
Recording · Pro
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03 · Diagnose
Read and clear fault codes and see why they happen: likely causes and symptoms for 850 common codes, a title for 9,000 more. Then follow a guided diagnosis that checks the causes against your car's live data.
Guided diagnosis · Pro
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04 · Causes
Why a code happens, and what to check first.
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05 · Health check
Half a minute in the seller's driveway: the fault codes, the readiness monitors, how recently codes were cleared and how the engine runs at idle — summed up in one clear verdict. With Pro, share it as a one-page PDF.
PDF report · Pro
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06 · Drive
A calm driving view — big gauges or health tiles, read at a glance — and a quiet chime only when something needs you.
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07 · Garage & VIN
Every car you own, with its history and its badge. A car built for North America is recognised from its VIN — make, model, engine and trim.
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Simulated data
Everything else
The snapshot your car saved when a fault set, and the codes that stay until a repair is confirmed — where your car supports them.
A title for more than 9,000 codes and causes for 850, from the open OBDex database, inside the app.
Before you clear, the app tells you what clearing resets.
It learns your car's protocol once, so next time it connects in seconds.
In Drive, a quiet sound when a value needs you, and silence the rest of the time.
Pricing
Everything you need to read your car.
One purchase. No subscription.
Pro is bought through Google Play.
What you need
LambdaOBD talks to your car through a small adapter. Nothing else to install, no account to create. Not every car reports every value, and there is no iPhone version yet.
A small plug for your car's OBD-II port. We test with the KONNWEI KW901.
A phone or a tablet with Bluetooth.
In the EU, petrol cars from 2001 and diesels from 2004. In the US, cars from 1996.
Private by design
LambdaOBD has no account, no ads and no tracking, and it never connects to the internet. What it reads stays on your device unless you choose to share it.
Free on Android