Fuel, down to the drive
Litres and L/100 km (or mpg) for every drive, day and month. Enter fill-ups and the estimate becomes a measurement calibrated to your car.
OBD-II for iPhone
Plug it in once. Every drive records itself.
Carbiter reads your car through a small Bluetooth adapter and works out what each drive cost in fuel, what the car is quietly telling you, and how it is changing — with the accuracy of every number stated beside it.
Coming soon to the App Store
1adapter for every car you own
0taps to start recording a drive
6languages, fault codes included
100%of your driving data stays on your phone
Everything the car knows
A quiet co-driver that never forgets a drive.
One drive is data; two hundred drives are a diagnosis. The adapter stays in the port, the phone stays in your pocket, and Carbiter does the rest.
Fault codes, explained
Stored, pending and permanent codes — and not just from the engine: Carbiter can ask every controller, from gearbox to brakes, in plain words.
An automatic trip log
Start the engine and drive. Each trip is recorded in the background with its route, distance, time, speed trace and fuel — no button, no forgetting.
Car health over time
Carbiter compares your car against its own history and tells you when something changes: working harder at idle, more effort to hold a speed, a cold engine that warms slowly.
One adapter, every car
Move the adapter between cars and Carbiter knows which one it is plugged into — by VIN, or by the sensors it answers. Each car keeps its own history.
0–100 km/h, timed
Acceleration runs and the quarter mile, measured from the car's own speed signal. 0–60 mph if you think in miles. Somewhere legal, please.
A live dashboard
Speed, RPM, coolant and battery voltage as you drive, with hints like warming up and smoother than usual. Pro lets you pick which readings are large.
Lock Screen & Siri
A Live Activity shows economy and distance on the Lock Screen while you drive. Ask Siri for your last drive or this month's driving.
Compare everything
The same commute, drive against drive. This month against last. The speeds and gears that suit your car, worked out from your own driving.
For fuel geeks
Find out where the fuel actually went.
Not just an average. Carbiter breaks each drive down into what was spent idling, braking and holding speed — and turns it into something you can change.
- Efficiency score for every drive, with what lowered it
- Losses in litres — at idle, under braking, at speed
- Your best speeds and gears, learned from your own drives
- Fill-up calibration turns estimates into measurements
- Month calendar of litres, distance and average economy
Car health
Hear what your car is quietly telling you.
A check-engine light is the end of a story. Carbiter follows the whole thing — across every drive — and says what changed, in words rather than hex.
- Fault codes from the emissions computers and, on request, every other controller
- Trends: idle effort, cruising effort, warm-up, battery
- Diagnostic snapshots you can keep, compare and export
- Read-only by design — Carbiter never writes to your car or clears codes
Performance
0–100 in 6,94 s. Measured, not guessed.
Arm a run, come to a stop, and go. Carbiter times it from the car's own speed signal and keeps every run on file, so you can see what that new set of tyres really did.
- 0–100 km/h or 0–60 mph
- Quarter mile with distance covered
- Run history per car
Honest numbers
Every number carries its confidence.
Most apps show a fuel figure and hope. Carbiter says how far to trust it — and gets more precise with every fill-up you log.
Before calibration
6,1 L/100 km
estimated · ±25 %
Worked out from what the engine reports.
After a few fill-ups
7,4 L/100 km
calibrated to your car
Checked against the fuel you actually bought.
How it works
Set up once. Then just drive.
Plug in an adapter
Any ELM327-compatible Bluetooth LE OBD-II adapter goes into the port under the dashboard. It stays there.
Pair it once
Turn the ignition on, open Carbiter and pick the adapter. The app recognises the car and learns what it can read.
Drive
From now on every drive records itself in the background. Open the app when you are curious — the numbers are waiting.
Which adapter? Look for “BLE” or “Bluetooth 4.0” on the box — for example Vgate iCar Pro BLE, OBDLink CX, OBDLink MX+ or Veepeak BLE. “Classic” Bluetooth and Wi-Fi adapters won't appear on iPhone. Most petrol cars from 2001 and diesels from 2004 (EU) or 1996 (US) speak OBD-II.
Inside the app
Calm screens for busy data.
Private by construction
Your drives are nobody's business.
Carbiter itself collects nothing. Your routes, your VIN and your driving history live on your phone and nowhere else.
No account
No sign-up, no email, no password. Install it and plug in.
No server, no analytics
There is no Carbiter cloud. Nothing is uploaded, and nothing needs to be.
Read-only
Carbiter only reads from your car. It never writes, programs or clears anything.
Lite & Pro
Free to drive. One purchase to go deeper.
Carbiter Lite is free and complete for everyday use. Carbiter Pro is a single in-app purchase — no subscription.
Carbiter Lite
Free, with one small banner ad
- Automatic drive recording and full trip history
- Fuel per drive and per month, fill-up calibration
- Efficiency score with a useful tip
- Fault codes with explanations and warnings
- Health findings when something changes
- Live speed, RPM, coolant and voltage
- One active car, earlier cars archived
One-time purchase
Carbiter Pro
Everything in Lite, plus
- Where the fuel went — idle, braking and speed losses
- Best speeds and gears for your car
- Compare drives and periods, route against route
- Health history charts and snapshot comparison
- Every reading the car reports, charts you choose, Mode 06 self-tests
- 0–100 km/h, 0–60 mph and quarter mile
- Several active cars and your own dashboard
- No advertising — the advertising code is never reached
Questions
What do I need to use Carbiter?
An iPhone on iOS 18 or later, a car with an OBD-II port, and an ELM327-compatible Bluetooth LE adapter. There is also a demo mode if you want to look around before buying an adapter.
Will my Wi-Fi or “Bluetooth 3.0” adapter work?
No. Carbiter talks to Bluetooth LE adapters. Classic Bluetooth adapters do not appear on iPhone at all, and Wi-Fi adapters use a different radio. Neither is a fault in the adapter — it is which radio the app uses.
Can I use one adapter for several cars?
Yes. Move the adapter to another car and Carbiter recognises it by its VIN, or by the set of sensors it answers if the car does not report a VIN. Each car keeps its own drives and history. Lite keeps one active car with an archive; Pro keeps several active.
Does it drain my car's battery or my phone?
Most adapters power down with the car. On the phone, Carbiter only wakes up when the adapter appears and deliberately reads a small set of values at a sensible rate rather than everything at full speed.
Can Carbiter clear fault codes or change settings in my car?
No — on purpose. Carbiter is read-only. It never writes to the vehicle, never enters programming modes and never clears codes, so it cannot make anything worse.
How accurate are the fuel figures?
Before calibration they are labelled as estimates, with their uncertainty shown. Log your fill-ups and Carbiter calibrates to your car, so the figures become measurements. Every number tells you which it is.
Which languages does it speak?
English, German, Spanish, French, Portuguese and Russian — including fault-code descriptions.
Your car has been talking.
Start listening.
Carbiter for iPhone. Free to download, with Carbiter Pro as a one-time purchase.
Coming soon to the App Store