Contractor's Cheatsheet
Build Right. Show Your Work.
Free · Designed for iPad. Not verified for macOS.
100+ code-compliant calculators with Bluetooth laser & multimeter input, job-based project tracking, iCloud sync, PDF reports, and session logging.
100+ trade calculators with Bluetooth tool integration, project tracking, and iCloud sync — all backed by current NEC, IPC, IRC, and IFGC code tables.
Contractor's Cheatsheet covers 8 trades in one app.
Bluetooth laser meters feed measurements directly into distance fields. Bluetooth multimeters stream live voltage and resistance readings for real-time verification. The Record Over Time feature catches sags, spikes, and intermittent faults you'd miss with a spot check.
Every calculation is automatically logged to the Session Tape — a searchable, timestamped record of your workday. Organize calculations by job with the Project system, add field notes, and generate PDF reports to hand off to your GC or email to the office. iCloud keeps projects in sync across all your devices.
ELECTRICAL — 15 calculators
Wire sizing with NEC 310.16 ampacity. Conduit fill for EMT, PVC, RMC, FMC. Box fill per NEC 314.16. Service load calcs. Panel schedule builder with bus balancing. Motor FLC and OCP per NEC 430. Transformer/kVA. Ohm's law. Parallel resistance. Generator sizing. Solar estimating. Conduit bending with concentric cutback marks.
PLUMBING — 13 calculators
DFU drain and vent sizing per IPC. Water supply with pressure zone analysis. Water heater sizing. Gas pipe sizing for NG and LP per IFGC 402.4 including multi-branch manifolds. Septic sizing. Pipe flow.
CARPENTRY — 26 calculators
IRC stair layout. Rafter lengths with birdsmouth cuts. Wall framing counts. Deck boards, joists, railing. Roofing squares. Drywall sheets. Paint gallons. Tile and flooring with waste. Board feet. Concrete volume. Header sizing. Crown miter angles. Hip/valley factors. Siding. Fencing.
HVAC — 13 calculators
Simplified Manual J. Duct sizing. MCA/MOP. Refrigerant line set charging. Airflow CFM. Temp rise/drop. ASHRAE 62.2 ventilation. Psychrometrics. Combustion air.
MASONRY — 10 calculators
Block and brick estimating with mortar. Concrete for slabs, footings, walls, piers, columns. Rebar with lap splices. Post holes. Cure time. Retaining wall footing.
WELDING — 10 calculators
Heat input. Preheat. Weld cost estimating. Gas usage. Carbon equivalent. Pressure vessel thickness.
ESTIMATING — 5 calculators
Markup with tax. Profit/loss per job. Labor burden. Grade and slope. Volume.
CONVERTERS — 8 tools
Feet-inch-fraction. Temp, pressure, flow, weight. Power cost. Bending reference.
WHAT SETS THIS APP APART
· Bluetooth laser and multimeter input into any measurement field
· Project tracking with notes, timestamps, and PDF report generation
· Session tape — automatic calculation log, searchable by date and trade
· AI trade assistant for code questions, material selection, and troubleshooting
· iCloud sync across iPhone and iPad
· NEC, IPC, IRC, IFGC code tables built in — not approximations
· Works fully offline
· No subscriptions, no ads, no account required
The developer, SampaTek Labs LLC, 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
- SampaTek Labs LLC
- Size
- 7.7 MB
- Category
- Business
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 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
- © SampaTek Labs 2026