For those who build the thing itself.
Five applications crafted for contractors, carpenters, plumbers, HVAC technicians, and electricians working in the field. Every formula, code chart, and reference you need between framing and final inspection — nothing to pack, nothing to forget at the shop.
Builder's Formulator
2,600+ calculators spanning construction, structural, electrical, plumbing & HVAC — the complete contractor's companion.
Carpentry Formulator
80+ calculators for stairs, roofing, lumber, crown molding, joists & beams, with a full carpentry reference guide.
Plumbing Formulator
Pipe sizing, drainage, venting, gas piping, medical gas, and code references from rough-in to finish.
HVAC Formulator
Duct sizing, fan & pump laws, psychrometrics, refrigeration, heating design and load calculations.
Electrical Formulator
AC/DC, Ohm's Law, motors, transformers, voltage drop, wiring and conduit sizing in a single reference.
For those who design the system.
Seven applications built for engineers and architects. From structural beams and concrete design to chemical process calculations, hydraulics, and hydrology — each volume is a pocket handbook for a single discipline, distilled into what you actually use.
Mechanical Engineer
Gears, bearings, fasteners, shafts, springs, stress & strain, thermodynamics, fluids, and machine design.
Civil Engineer Pro
Structural analysis, surveying, concrete, soils, highways, and hydrology for civil engineers and estimators.
Architect's Formulator
Occupancy loads, ADA accessibility, structural basics, materials, and design-phase references.
Chemical Engineer
Mass & energy balances, reaction engineering, distillation, heat transfer, and unit operations.
Electronic Engineer
Op-amps, filters, resonance, digital logic, signal processing and analog circuit design.
Hydraulic Engineer
Cylinders, pumps, valves, pipe flow, pressure drops, and fluid-power system sizing.
Hydrology Formulator
Precipitation, runoff, groundwater, open-channel flow, and watershed calculations for hydrologists.
For those who make it pay.
Three applications for the estimators, investors, and project managers whose spreadsheets ultimately decide whether the work gets done. Utility engineering, real-estate analysis, and a full financial calculator.
Water & Waste Management
Treatment plant operations, wastewater processing, flow rates, dosing, and operator certification references.
Real Estate Investor
Cap rates, cash-on-cash, NOI, rental analysis, mortgage amortization, and deal evaluation tools.
Finance Formulator
Time value of money, loans, bonds, ratios, depreciation, and investment formulas — the MBA toolkit.
Built for the field, not the shelf.
Every Formulator app runs entirely on-device. No cloud, no subscriptions for the core calculations, no internet required. Download any volume to begin.
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