Calc Zest vs birthchart.io

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

Calc Zest compared with birthchart.io
Detail	Calc Zest	birthchart.io
What it does	Free online calculators for finance, taxes, and healthcare decisions	Birth chart calculator
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	RSU tax estimation ESOP value calculator Dental implant cost estimator Markup calculator Reverse sales tax calculator Share incentive plan calculator Mobile-friendly interface Transparent calculation breakdown Real-time results	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
What makes it different	Completely free with no hidden fees or paywalls No data storage or tracking of personal information Instant results without sign-up required Plain language explanations with no jargon Formulas verified and tested against real-world scenarios	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
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	2 no change since last check
Trust Flow (Majestic)	1	4
Citation Flow (Majestic)	8	12
Referring domains (Majestic)	4	3

4 details filled in for both companies.