birthchart.io vs BuildingCalc

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

birthchart.io compared with BuildingCalc
Detail	birthchart.io	BuildingCalc
What it does	Birth chart calculator	Free professional construction calculators for contractors, DIYers and architects
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Calculate Sun, Moon and rising signs Shows ten planets and aspects Multiple house systems available Private data processing on device Save birth details to browser Support for unknown birth times Historical time zone handling	45 specialized trade calculators Real-time calculation updates as you type PDF and Excel export with company branding Adjustable waste factors on all calculators Material rate library with regional presets Multi-language support in 13 languages Mobile-friendly responsive design Works offline entirely in browser
What makes it different	Calculated entirely on your device with no cloud storage No account or login required Uses Astronomy Engine for precise geocentric calculations Explains astrological concepts and limitations	No sign-up, no account required Privacy-first: all calculations run locally in browser Industry-standard formulas from ACI, NEC, and IRC codes Professional exports ready for client bids and supplier orders Customizable material rates that sync across all calculators
Community votes	0	0
DR (Domain Rating by Ahrefs)	4 +2 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	4	0
Citation Flow (Majestic)	12	13
Referring domains (Majestic)	3	1

4 details filled in for both companies.