Engineering ToolsThe field toolkit that works without a signal.

105 calculators, estimators, converters and references across 11 disciplines. Every calculation runs on the device, and the app does not even request internet access.

Price: $4.99 one-time
Version: 1.0
Updated: Aug 21, 2026

Works on

Phone
Tablet
Android TV
Fire TV

At a glance

105 tools
11 disciplines
No internet permission
10 languages

105 engineering calculators that never need a signal.

Every discipline, one workspace

Electrical, mechanical, civil, fluid and thermal, materials, structural, plumbing, safety, surveying and GIS, energy and conversions.

Fast inputs, clear results

Enter the values you have, read the result, then save, copy, share or print it.

Your work stays close

Saved calculations stay on the device. Export a JSON backup to move them between devices you control.

Find the right tool in seconds

Search the full catalog, browse by discipline, pin favourites and jump back into recent tools when a job is already underway.

Estimate more, guess less

Material estimators for drywall, paint, lumber, masonry and more — from stair stringers to cut-and-fill volumes.

The details.

Electrical
Voltage drop, conduit fill, box fill, service and panel load, wire resistance and lighting lumens.
Mechanical and materials
Gear ratios, shaft sizing, pulley speed, spring rate, board feet, compound miters and CMU grout volume.
Civil and surveying
Slope and grade, cut and fill, stair stringers and fall clearance.
Remote-friendly
Touch, keyboard and D-pad focus keep every numeric control reachable on a TV.