Focused Tools
Each app is organized around a specific working domain. The portfolio avoids broad, cluttered utility bundles and keeps each calculator close to the task it supports.
CalcMason Labs
Offline calculator apps for technical work.
CalcMason builds focused Android calculators for field estimating, shop math, aviation training, marine planning, diving gas arithmetic, and radio reference work.
Offline Core
Calculator engines run on the device. Network access is used for Google services such as advertising, consent, billing, and Play delivery where those services are part of the app.
Clear Boundaries
Results are calculation aids. Regulated, safety-critical, or code-adjacent decisions remain subject to official references, qualified review, and local requirements.
Portfolio
Apps
SiteCalc
SiteCalc: Builder's Calculator
Material estimating for concrete, paint, tile, flooring, mulch, and gravel.
SiteCalc
SiteCalc: Electrician Calc
Electrical job-site calculators for voltage drop, wire size, conduit fill, box fill, and basic circuit math.
SiteCalc
SiteCalc: Woodworking Calc
Woodworking calculators for board feet, shop fractions, miter angles, wood movement, epoxy volume, and cut lists.
SiteCalc
SiteCalc: Fence & Deck Calc
Fence and deck material planning for boards, posts, concrete, balusters, stairs, and project lists.
SiteCalc
SiteCalc: Plumber's Calc
Pipe and plumbing calculators for offsets, rolling offsets, slope, pipe volume, flow, and conversions.
SkyCalc
SkyCalc: E6B Flight Computer
Offline E6B-style calculators for wind correction, density altitude, true airspeed, fuel, practice problems, and weight and balance.
SiteCalc
SiteCalc: HVAC Duct Calc
HVAC field calculators for duct sizing, rectangular equivalent diameter, airflow, velocity, superheat, subcooling, and PT reference.
SeaCalc
SeaCalc: Marine Nav Calc
Marine navigation calculators for great-circle and rhumb-line distance, ETA, fuel range, hull speed, dead reckoning, and conversions.
ShopCalc
ShopCalc: Machinist Calc
Shop-floor math for speeds and feeds, tap drills, bolt circles, trigonometry, drill depth, MRR, horsepower, and conversions.
SiteCalc
SiteCalc: Welding Calc
Brand-neutral welding math for heat input, fillet weld geometry, carbon equivalent, filler weight, shielding gas, and conversions.
SeaCalc
SeaCalc: Dive Gas Calc
Dive gas arithmetic for SAC, RMV, MOD, best mix, EAD, partial pressure, gas required, and reserve planning.
SkyCalc
SkyCalc: Ham Radio Calc
Radio calculators for antenna length, SWR, coax loss, decibels, Ohm's law, Maidenhead grid squares, and reference cards.
How CalcMason Apps Handle Data
On-device calculatorsInputs are processed locally by the app.
Local preferencesSettings, history, and entitlement cache stay in app storage.
Google servicesAds, consent, and purchases are handled by Google SDKs where included.