Disk Prices 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.

Disk Prices compared with BuildWire Calc
Detail	Disk Prices	BuildWire Calc
What it does	Compare HDD and SSD prices with full specifications and price per terabyte in the US	Offline calculators for electricians, builders and HVAC technicians
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	US
Pricing model	Free	Freemium
Pricing	Not 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	Customizable columns for specifications like RPM, CMR/SMR, IOPS, TBW, and warranty Price per TB and price per GB calculations for fair capacity comparison Full-parameter comparison table with 50+ specifications per drive	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	Includes 50+ specifications from manufacturer documentation, not just price and product name Critical fields like capacity, media type, and CMR/SMR recording type are manually verified for accuracy Community-maintained workspace where edits are reviewed and shared with all users	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 votes	1	0
DR (Domain Rating by Ahrefs)	23 −1 (down) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	8	0
Citation Flow (Majestic)	28	13
Referring domains (Majestic)	116	1

5 details filled in for both companies.

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