About
Built for people who live off their batteries
Whether it’s a weekend away or months on the road, the last thing you want is a flat leisure battery, or a starter battery that won’t turn the engine over.
Why Voltsure
Bluetooth battery monitors like the BM2 are cheap, clever little devices, but the apps that come with them can ask for an account, want your location, or bury the numbers you actually need. Voltsure started from a simple idea: show what your batteries are doing, clearly and honestly, and keep everything on your device.
What we care about
Private by design
No account, no servers, no analytics and no location. Your readings stay on your device, and the app works fully offline, which is just as well when you’re parked up somewhere without signal.
Honest about the numbers
A voltage-only monitor can’t measure current, so Voltsure never pretends it can. Charge is an estimate and labelled as one, with clear notes when a reading is under load or still settling.
Fair pricing
The essentials are free. Voltsure Pro is a single purchase, shared with your family, with no subscription.
Who makes it
Voltsure is designed and built in the UK by Seventy Two Agency, who also make 5K QR Code, the parkrun companion for iPhone, Apple Watch and Garmin.
Got an idea or found a problem?
We’d love to hear from you. Visit support or email info@seventytwoagency.co.uk.