Works without signal
Deep in a cellar or up on a roof: Blok's calculations work without an internet connection.
Construction Calculator for Tradespeople
The calculation tool for the modern job site.
Concrete, mortar, slab, tiling, roofing, plumbing, electrical… over 70 professional calculations in your pocket, instant, accurate and drawn in 3D. Calculations work without signal, in a basement or the middle of nowhere.
Formulas follow the standards of the country you choose: DTU and NF in France, and the rules in use in each supported country.
Over 70 professional calculations
Works without signal
- Over 70 professional calculations
- Works without signal
- Barto, your job site assistant
- iPhone and Android
The modules
Over 70 professional calculations, sorted by module
On a job site, you don't have time — and you don't always have signal.
- Masonry
- Plastering
- Tiling
- Painting
- Roofing
- Electrical
- Plumbing
- Earthworks
- Geometry
- Conversions
The result in 3D
Slab, wall, stairs, roof: the structure you calculate is drawn in 3D, with dimensions, so you can check everything at a glance.
Barto, your job site assistant
Got a question? Barto, Blok's beaver, answers and opens the right calculation, already filled in. He needs an internet connection and can make mistakes: always double-check.
Your country's standards
Bag sizes, mains voltage, installation rules: Blok adapts to the country you choose (DTU and NF in France).
Blok is an estimation tool. For any calculation critical to the safety of a structure, always consult a qualified engineer or structural firm.
A glimpse
Built for the job site
Pick a trade, enter your measurements: the result appears, in figures and in 3D.
Blok Pro
Blok Pro unlocks every feature of the app; the free version gives limited access. No ads in either.
The price and terms of the offer are shown in the app and on the store before any purchase. Details in the Terms & Conditions.
- Every feature of the app
- No ads
- Payment through your Apple or Google account
Over 70 professional calculations in your pocket
Available on iPhone and Android.