BuildWire Calc vs TrustTheCalcs

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

BuildWire Calc compared with TrustTheCalcs
Detail	BuildWire Calc	TrustTheCalcs
What it does	Offline calculators for electricians, builders and HVAC technicians	Construction calculators that show their math
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	Not given
Pricing model	Freemium	Free
Pricing	Free: nine calculators (voltage drop, Ohm's law, watts to amps, concrete slab, roof pitch, board feet, BTU, CFM, BTU to kW), no time limit. Pro: $9.99 per year or $19.99 lifetime (one payment, no renewal).	Not given
Key features	Wire sizing and voltage drop calculations Conduit fill and box fill calculations Offline operation with no network required Transparent calculation steps and NEC warnings Job organization and PDF/CSV export Motor and generator sizing calculators Power and conversion calculators Building calculations for concrete and roof pitch No ads and no account required Private with data staying on device	Every constant cited to ASTM, CMHA, or datasheet Two calculation methods shown separately Free and private, no account required
What makes it different	Works completely offline with no network or cellular signal required Private by design with no account, no ads, and calculations never leaving your device Shows exact NEC formulas and calculation steps so you can verify results before fieldwork Over 35 specialized calculators covering electrical, building and HVAC trades Tested code with automated tests against independently worked examples	Every constant traced to named source and shown next to result Shows both methods when they disagree instead of averaging them Solves massive discrepancy in published block fill volumes Calculations run in browser with no data storage Built on version-controlled, auditable reference data modules
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	8 no change since last check
Trust Flow (Majestic)	0	5
Citation Flow (Majestic)	13	22
Referring domains (Majestic)	1	7

4 details filled in for both companies.

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