153 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

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: model tree, properties, colour by property, two models together, BCF issues, sections and measuring. BIM Explorer Pro adds IDS checks, clash checks, storey plans to PDF and quantity takeoff with a BOQ linked to the model.

Planning · Free · Also in your browser

Calendar

Day, week, month, timeline and agenda views with projects and time tracking. Calendar Pro adds reminders, planners, themes and an AI assistant.

Calendar week view with projects

Try one in your browser now

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

See all 48 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

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