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Speedometer.tools vs BuildWire Calc

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

Speedometer.tools compared with BuildWire Calc
DetailSpeedometer.tools logo Speedometer.toolsBuildWire Calc logo BuildWire Calc
What it doesFree online GPS speedometer for your phone Offline calculators for electricians, builders and HVAC technicians
StageNot given Not given
FoundedNot given Not given
Based inNot given US
Pricing modelFree Freemium
PricingNot given 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).
Key features
  • Live GPS speed display
  • Maximum speed tracking
  • Average speed calculation
  • Distance measurement
  • Multiple speed units (mph, km/h, knots, m/s)
  • HUD (head-up display) mode
  • Over-speed alert
  • Trip time recording
  • GPS accuracy indicator
  • Speed tests for cars, trains and walking
  • 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
What makes it different
  • Completely free with no sign-up or installation required
  • Works offline after page load
  • Privacy-focused with location data never leaving your device
  • More accurate than car speedometers
  • 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
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)013
Referring domains (Majestic)01

4 details filled in for both companies.

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