One-time purchase · No subscription · BS 7671
The UK electrician's toolbox — now in your pocket.
Every BS 7671 calculator on this site, native on iPhone. Works offline on site, saves your jobs, and launches instantly from your home screen. Buy once — yours forever, no subscription.
Works offline on site
Every calculator runs with no signal — basements, plant rooms, new builds. The full toolbox in your pocket, wherever you are working.
Saves your jobs
Results and projects are stored on your phone, so you can pick up exactly where you left off on the next visit.
Instant from your home screen
Launch straight from the home screen — no browser, no loading. The fastest way to the tool you need.
Buy once on the App Store — £14.99, yours forever
Prefer the web? Every calculator is free at londonelectricaldistributors.co.uk/tools — the app just adds offline access and saved jobs.