CalcMason Labs

Offline calculator apps for real work.

CalcMason builds focused Android calculators for tradespeople, makers, pilots, mariners, divers, and radio operators. The apps are designed to work offline, show the math, and avoid account lock-in.

CalcMason Labs header

Apps

SiteCalc

SiteCalc: Builder's Calculator

Concrete, paint, tile, mulch, and gravel estimates for DIY builders and small contractors.

com.calcmason.sitecalc

SiteCalc

SiteCalc: Electrician Calc

Voltage drop, wire sizing, conduit fill, box fill, and electrical jobsite calculations.

com.calcmason.sitecalc.electrician

SiteCalc

SiteCalc: Woodworking Calc

Board feet, fractions, miter angles, wood movement, epoxy volume, and shop estimates.

com.calcmason.sitecalc.woodwork

SiteCalc

SiteCalc: Fence & Deck Calc

Deck boards, fence materials, post concrete, balusters, stairs, and project lists.

com.calcmason.sitecalc.fencedeck

SiteCalc

SiteCalc: Plumber's Calc

Pipe offsets, rolling offsets, drain slope, pipe volume, flow, and plumbing conversions.

com.calcmason.sitecalc.plumber

SkyCalc

SkyCalc: E6B Flight Computer

Offline aviation calculators for wind, density altitude, TAS, fuel, practice, and W&B.

com.calcmason.skycalc.e6b

SiteCalc

SiteCalc: HVAC Duct Calc

Duct sizing, airflow, sensible heat, superheat, subcooling, and PT reference tools.

com.calcmason.sitecalc.hvac

SeaCalc

SeaCalc: Marine Nav Calc

Great-circle and rhumb-line distance, ETA, fuel range, hull speed, and dead reckoning.

com.calcmason.seacalc.nav

ShopCalc

ShopCalc: Machinist Calc

Speeds, feeds, tap drills, bolt circles, trig, drill depth, MRR, and shop conversions.

com.calcmason.shopcalc.machinist

SiteCalc

SiteCalc: Welding Calc

Heat input, fillet welds, carbon equivalent, filler weight, shielding gas, and weld math.

com.calcmason.sitecalc.welding

SeaCalc

SeaCalc: Dive Gas Calc

Gas arithmetic for trained divers: SAC/RMV, MOD, best mix, EAD, ppO2, and reserves.

com.calcmason.seacalc.divegas

SkyCalc

SkyCalc: Ham Radio Calc

Antenna length, SWR, coax loss, dB math, Ohm's law, grid squares, and radio references.

com.calcmason.skycalc.hamradio

Privacy First By Design

Core calculators run offline. App-owned code does not create accounts or run a developer backend. Ads, consent, and purchases use Google SDKs and are disclosed in each app-specific privacy policy.

Publication Links

Use https://calcmason.com as the Google Play developer website for each app.

Each app has a dedicated privacy URL under /privacy/appN.html.