15 professional calculators. Live diagrams. Speak button for hands-free use. Works where there's no signal. Free to try — no charge for 3 days.
Not a generic app factory product. Every screen, every diagram, every interaction was crafted for the person wearing gloves, standing in direct sunlight, needing the answer in seconds.
3 days free — no charge, no commitment. After the trial, keep it with a weekly plan or buy it outright for life. No ads, no upsells, ever.
Basement slabs, rural sites, underground car parks, tunnel formwork — wherever you are, it works. No Wi-Fi. No 4G. No excuses.
Every calculator has a live diagram that reacts as you type. Watch your staircase build step by step. See your raked wall slope in real time.
Baluster spacing and running measurement marks read out loud. Your hands are on the tools — the app calls the numbers for you.
Built in mm — not converted from feet. Switch to ft/in/fractions in Settings and it applies everywhere instantly. Designed for AU, NZ & UK.
Send a full formatted calculation breakdown — inputs, outputs, all rows — straight to your client, supplier, or crew via any messaging app.
From stairs to concrete, raked walls to dumpy levels — if you need a number on a building site, it's in here. More coming in v2.0.
Rises, going, stringer, slope & angle
Running table + voice readout
Diagonal verification — Mode A & B
10 solving modes — any 2 values
Lineal metres + waste factor
Posts, studs, balusters layout
Tape marks + voice readout
Stud cutting list, Mode A & B
9 right-triangle solving modes
Slab & hole/column volumes
Rise/fall surveying — Mode A & B
Volume, weight & order quantity
Volume, weight & order quantity
Volume, weight & order quantity
Wall framing layout
Roofing, geometry, trades — v2.0
When you have a question or find a bug, you're talking directly to the person who built the app — not a support ticket queue, not a bot, not an offshore team.
That's the standard every other app in this category has given up on. We haven't.
Email the DeveloperReal answers, not auto-replies. If you report a bug, it gets fixed — not logged and forgotten.
The v2.0 roadmap is built entirely from what real tradies ask for. Your request matters here.
Every new calculator, every fix, every improvement — included while you're subscribed, or forever if you buy outright.
One download. All 15 calculators. Works offline. Backed by the developer.
Free for 3 days. No ads. No compromises.
Free 3-day trial · Cancel anytime · Android 7.0+