birthchart.io vs The Body Index

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 The Body Index
Detail	birthchart.io	The Body Index
What it does	Birth chart calculator	Free body-metric calculators with no accounts or ads in results
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	Open source formulas on GitHub
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	Calculators for metrics beyond BMI that major sites haven't adopted Open source formulas validated against peer-reviewed research papers All code available under MIT license for verification and reuse Free embeddable widgets with attribution for other websites
Community votes	0	0
DR (Domain Rating by Ahrefs)	4 +2 (up) since last check	Not checked yet
Trust Flow (Majestic)	4	0
Citation Flow (Majestic)	12	0
Referring domains (Majestic)	3	0

4 details filled in for both companies.