Help
Setup
First-time install, OBD adapter photos, permissions, first drive, and optional web upload: Getting started.
- Step 4 — plug in the adapter (with photos)
- Step 5 — connect from the app
- Step 6 — drive and record a trip
- Step 8 — web dashboard and upload (optional)
What GasTab needs
An iPhone, a BLE OBD2 adapter in the OBD2 port, and a gasoline or hybrid vehicle with OBD2 that provides usable speed/RPM data. Full checklist and walkthrough: Getting started.
Bluetooth: iPhone Settings vs GasTab Settings
- iPhone Settings → Bluetooth (main screen): turn Bluetooth on. Do not tap Connect next to your OBD adapter here.
- iPhone Settings → Privacy & Security → Bluetooth: make sure GasTab is turned on.
- GasTab Settings (Live → gear): driver name, vehicle, gas price, and optional upload — not Bluetooth pairing.
Connect OBD from the app
See Getting started → Steps 4–5 for plug-in photos and the Live → Start connection flow.
Do not pair the OBD adapter in iPhone Settings → Bluetooth. Leave Bluetooth on and connect from GasTab → Live → Start.
OBD2 BLE adapters
GasTab has been tested with OBDLink CX, Veepeak OBDCheck BLE, and Vgate iCar Pro BLE. Adapter photos and port orientation: Getting started → Step 4.
If connection gets stuck after experimenting in iPhone Settings, use Forget This Device for that adapter under iPhone Settings → Bluetooth, unplug it for about 30 seconds, replug it, open GasTab → Live → Start, then start the engine.
Vehicles
A U.S. light-duty gasoline or hybrid vehicle with an OBD2 port is required (most from 1996 onward). Basics: Getting started.
So far GasTab has been tested most with 2023 and 2025 Subaru Crosstreks. OBDLink CX often does not work reliably, or does not provide usable streaming data, with many GM and Ford vehicles.
Troubleshooting
- Bluetooth unauthorized: iPhone Settings → Privacy & Security → Bluetooth — make sure GasTab is turned on (GasTab appears after at least one Live → Start attempt).
- No adapters found: confirm you’ve opened GasTab, tapped Start, then started the engine. Also check iPhone Bluetooth is on, adapter is fully seated, and the phone is near the dash.
- Stuck connecting: forget the adapter under iPhone Settings → Bluetooth, unplug it for about 30 seconds, replug, open GasTab → Live → Start, then start the engine.
- Ready but no RPM/speed: if you have not started the engine yet, start it now and wait a few seconds. If values stay blank, send Scott the Connection Info from the Live screen.
Web sync (optional)
Upload trips is off by default. Trips stay on your iPhone unless you turn upload on in GasTab Settings (Live → gear).
Full setup (token, upload, sign-in): Getting started → Step 8. The app may suggest web sync after you have recorded several trips.
- Trip on phone but not on web: confirm the trip on the phone first, then check that Upload trips is on, the access token is correct, and you had network access after the trip ended.
- Dashboard login fails: use the exact token Scott sent, with no extra spaces.
- No token yet: the web dashboard is in early access (invite-only for now). Request one via intake.php — Scott usually emails a token within 6–12 hours (often sooner). You can record on your phone while you wait.
Still stuck?
Having problems connecting? Tap Copy Info in the app (on the Live screen), then email the pasted details or a screenshot to scott@getcarprint.com. (If you use the web dashboard, you can also add a note to your profile.)