GearTech OS
Field calculators for trades
Free · Designed for iPad. Not verified for macOS.
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.
NEW — CRANE HAND SIGNALS IN 3D.
22 ASME B30.5 signals. The signal person gives the signal and the crane performs the motion, with the load always plumb. Spin the camera and watch it from wherever you have to stand.
NEW — FLANGE BOLT-UP.
Target-stress torque by bolt size, material, lubricant and percentage of yield, with the 30/60/100% passes worked out and the tightening order drawn for 4 to 32 bolts.
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
- Crane hand signals in 3D and flange bolt-up torque
- Constants cheat-sheet and a 272-question practice EXAM for the NITC / UA STAR, including crane signal person — every question explained step by step, and the app remembers what you missed
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 — the 3D included. 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
3D crane hand signals
A new three-dimensional viewer with 22 ASME B30.5 signals. The signal person and the crane perform the motion in real time, and you can orbit the camera to see it from any angle, including the operator's point of view.
Everything works offline
The 3D engine now ships inside the app. Rolling 3D, Fit-up and the crane signals work the same inside a plant or refinery with no signal.
180 new exam questions
Two new sections were added: Crane signal person (1926.1419, 1926.1422 and ASME B30.5) and NITC final practice. The bank is now 272 questions, each with an explanation and a step-by-step solution.
The exam now remembers your progress
It tracks which questions you have mastered and which you missed, with progress by category. The "Review my mistakes" button builds a session from only the ones you still owe.
Flange bolt-up
A target-stress torque calculator with bolt material, lubricant and percentage of yield, plus the 30/60/100% passes and the tightening-order diagram for 4 to 32 bolts.
The developer, Josue Ponce, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Josue Ponce
- Size
- 2.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Per Diem Syndicate
