Live engine data
RPM, temperatures, battery, turbo and fuel use while you drive. Charts and alerts when a value goes out of range.
- Engine RPM
- 820
- Speed
- 0
- Coolant °C
- 88
- Battery V
- 14.0
Free OBD2 scanner · iPhone and AndroidYour car,
No adapter? Try it with the built-in demo car.
Your car,
finally clear.
Live engine data, fault codes explained, trips and fuel use. All free and with no account: your data stays on your phone.
Coming soon onApp Store
Coming soon onGoogle Play
- FreeEvery feature, forever.
- No accountOpen the app and connect your car.
- On your phoneYour data never leaves it.
- 63 profilesFiat, VW, Peugeot, Toyota…
- In the carAndroid Auto, CarPlay soon.
Features
What your car knows, in plain words.
Live
Fault codes explained
Read and clear errors, with a plain-language explanation.
P0420Catalyst efficiency below threshold, bank 1
Trips and fuel use
How much you burn and how much you spend, trip by trip.
5.4L/100 km · €3.90
Your own dashboards
Build the screen you want to look at while you drive, even full screen.
VIN and control units
Recognises make and model and shows versions, part numbers and dates for every control unit.
AI assistant
Ask what a code means or why a warning light is on: it answers using your own car's data.
How it works
Three steps and you're in.
Plug in the adapter
The OBD port is usually under the steering wheel, on the driver's side.
Connect it to the app
Bluetooth, BLE or Wi‑Fi. Turn the ignition on: you don't need to start the engine.
See what happens
Live data, codes and fuel use, right on your phone.
Mekaido AI
A pocket mechanic. You choose how to use it.
The assistant only reads what you decide to show it and never writes to your car. Every other feature in the app stays free.
With your own API key
FreeConnect your own OpenAI, Claude, Gemini or OpenRouter account and pay only for what you use, straight to the provider. You need an API key and a bit of know-how.
- All the assistant's features
- The key stays on your phone
- No cost from us
Mekaido AI
€10per monthReady right away, no keys to set up. Subscribe here on the website and use it in the app with the same account. Cancel any time.
- Nothing to configure
- Daily and monthly messages always visible
- Same account in the app and on the site
Adapters
Which adapter do you need?
An ELM327-compatible OBD2 adapter. The cheapest ELM327s are enough for engine data, but often can't talk to individual control units such as ABS and airbag.
- iPhoneBLE or Wi‑Fie.g. OBDLink CX, vLinker MC+
- AndroidBluetooth, BLE, Wi‑Fi or USBall ELM327 types
- No adapterBuilt-in demo carto try the app
Privacy
Your car's data stays yours.
The app works without an account and keeps trips, recordings and codes on your phone. No ads, no tracking.
You only need an account if you want Mekaido AI or the synced garage. Sharing anonymous diagnostic data to improve the profiles is always your choice, and you can turn it off at any time. With Mekaido AI, your messages go through Vercel AI Gateway (Vercel, our host) to the AI provider we choose, currently OpenAI. Under the provider's API terms they are not used to train models, and we do not store them; the provider may keep them for a limited time to prevent abuse.
Frequently asked questions
Will it work with my car?
In Europe the OBD port has been mandatory on petrol cars since 2001 and diesel since 2004; in the United States since 1996. The standard data works on all of them; profiles add extra values for 63 models and makes.
Which adapter do I need?
An ELM327 or compatible: BLE or Wi‑Fi on iPhone, also classic Bluetooth and USB on Android. To read ABS, airbag and the other control units, pick a model that really handles addressing.
Is it really free?
Yes, every feature of the app. You only pay if you choose Mekaido AI; with your own API key the assistant is free too.
Can I clear fault codes?
Yes, after a confirmation. The warning light stays off only if the fault has been fixed.
Can I try it without an adapter?
Yes: the app includes a demo car that simulates the engine, codes and control units.
Connect your car in a minute.
Free, no account. If you don't have an adapter yet, start with the demo car.
Get Mekaido