160 apps · Windows and your browser

Construction software and free calculators for UK trades

Software for the job in hand.

Takeoff, estimating, site records, safety, quotes and invoices - plus a few things for when the work's done. Free or free to try, no account needed, and your data stays on your PC.

  • ON THE MICROSOFT STORE
  • NO ACCOUNT NEEDED
  • CYBER ESSENTIALS CERTIFIED

New and updated

Everything that's new →

Start with what you do

See every app →
BIM Explorer Pro quantity takeoff grouped by IFC type
BIM · Free, with optional Pro

BIM Explorer

Free IFC viewer in English, French and German: floor plans on screen, a quantity check, model tree and properties, colour by property, two models together and BCF issues with sections. BIM Explorer Pro adds quantity takeoff to a BOQ linked to the model, IDS checks with a UK check pack, clash checks and storey plans to PDF.

Planning · Free · Also in your browser

Calendar

Day, week, timeline, month and agenda views with projects, time tracking and a site diary. Calendar Pro adds reminders, a year view, timesheets and invoices, and backups.

Calendar week view with projects

Try one in your browser now

123 apps open in your browser - no install, no sign-up. Here are eight to start with.

See all 123 browser apps →

When the work's done

Card games, cue sports, the night sky and a few quiet minutes. The Lamplight games →

Home & leisure →
01

Your data stays on your PC

No cloud account to set up. Your projects live where you saved them.

02

Cyber Essentials certified

Independently certified, and the Windows apps come through the Microsoft Store.

03

Try before you buy

78 apps are free. The rest have a free trial and a one-off price.