GearTech OS

GearTech OS replaces the box of single-purpose calculators in your truck with one app built for the trades — by someone who works them.

Pick your trade and get tools made for it: pipefitting, welding, electrical, framing, concrete, HVAC, plumbing, machining, solar, sheet metal and automotive. No pipe jargon cluttering the electrician's screen, no electrical keys on the welder's — each trade gets its own tools and its own keypad shortcuts.

EVERY result shows the math. Tap "Show math" under any answer to see the formula, your numbers plugged in, and the result. Learn it, trust it, and check your work in the field.

REAL diagrams. Every tool draws what you're building — a 3D rolling offset box, a butt-weld elbow you can cut to a custom degree, a saddle/fishmouth, a reducer cone, roof rafters, conduit fill, ducts, gears and more.

Built for pipefitters and welders first:

• Pipe offsets, rolling offsets, fishmouth/saddle templates, miters, trunnions, reducers (concentric & eccentric), and ASME B16.9 fittings with custom degrees
• Spread/line banks, slope/grade, thermal expansion
• Constants cheat-sheet and a practice EXAM for the NITC / UA STAR

Plus 100+ tools across 10 more trades:

• Electrical: voltage drop, conduit fill (NEC), box fill, ampacity + derating, motor FLC, 3-phase power, stub-up take-up
• Framing: rafters, hip/valley/jack, stairs, pitch, baluster spacing, board feet
• Concrete: slab/footing/column volume, bags, rebar, blocks
• HVAC: tonnage, CFM, duct sizing (round & rect), friction rate, sensible BTU
• Plumbing: drain slope, DFU, fixture units to GPM, pipe sizing, gas pipe
• Machinist, Solar, Welding, Sheet metal, Automotive

Works 100% offline. No account, no ads, no tracking. Your settings, cut lists and memories stay on your phone.

Bilingual: English and Spanish, switch anytime.

We build the world around us. Our tools should be built for us.

— Per Diem Syndicate