Most trade calculator apps don't tell you which code edition they reference. That's a problem when you're pulling permits. FieldCalc Pro has 28 calculators for electricians, HVAC techs, and contractors — every result cites the exact standard: NEC 2023, ASHRAE 62.1, IRC 2021, ACI 318-19. Works 100% offline. No account. No ads. No data collected. 2.5 MB. 6 calculators free forever. Pro is $4.99/mo with a 7-day free trial.
