# Contractor's Cheatsheet — Build Right. Show Your Work.

> Build Right. Show Your Work. (iPhone/iPad app by SampaTek Labs LLC.)

- Source: https://appshunter.io/ios/app/contractors-cheatsheet/id6760083845 (this page in markdown: same URL + `.md`)
- Developer: [SampaTek Labs LLC](https://appshunter.io/developer/1880502478)
- Category: Business, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 7 MB
- Languages: American English
- Released: 2026-05-22
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/contractors-cheatsheet/id6760083845/reviews.md

## What is Contractor's Cheatsheet?

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


## Version history (last 1 release)

### 2.0 — 2026-05-22

No release notes.

## More apps by SampaTek Labs LLC

- [Songwriter's Calculator](https://appshunter.io/ios/app/songwriters-calculator/id6759758294)
- [InterTwined - Pattern Tracker](https://appshunter.io/ios/app/intertwined-pattern-tracker/id6762224069)
- [321clutch](https://appshunter.io/ios/app/321clutch/id6778216018)

All apps by SampaTek Labs LLC: https://appshunter.io/developer/1880502478

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-09.*