The mobile app
BattGrade in your pocket.
Issue a verified battery certificate from any modern smartphone in under 10 minutes, with any OBD2 dongle you already own.
iOS 14+ · Android 9+ · Bluetooth 4.0+
9:41100%
Test complete
28 May 2026, 14:32
91.3%
State of Health
GRADE A
71.3
kWh
478
km
412
cycles
Save & Generate Certificate
The whole flow
Connect, read, certify, on the spot.
Connect to any OBD2
Pair a standard Bluetooth dongle in seconds.
Read battery in ~5 min
Live BMS read with honest, step-by-step progress.
Issue on the spot
A signed, verifiable certificate, emailed instantly.
Everything in one app
Built to do one job flawlessly.
Connect any OBD2 dongle
Read battery in under 10 min
Cell-level State of Health
Signed PDF certificates
Public QR verification
Offline mode + auto-sync
White-label branding
8 languages
Searchable test history
Re-send certificates anytime
GPS location stamp
Haptic feedback
Works with
Popular OBD2 dongles, ready to go.
4.7 · loved by inspectors
“Issued my first certificate in the parking lot. Customer scanned the QR on the spot. Game changer.”
Markus K. · App Store
“The offline mode is brilliant. I test in basement garages and everything syncs later.”
Sofia D. · Google Play
“We run fleet intake through the batch mode. Fast, and the data feeds straight into our systems.”
Laurent R. · App Store
“Clean, focused, does exactly one thing perfectly. The score animation is a nice touch too.”
Anaïs F. · Google Play
Get the app.
Free to download. Your first 30 days are on us, no card required.
On desktop? Send the link to your phone.