EZGrader vs Natal Chart Lab

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

EZGrader compared with Natal Chart Lab
Detail	EZGrader	Natal Chart Lab
What it does	Free grading calculator and printable chart for teachers	Free astrology calculators with published methods and astronomical accuracy
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	SG
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Three grading scales (standard, strict, lenient) Printable grading charts Half-point deductions GPA points column CSV export for spreadsheets Up to 200 questions Offline functionality No data collection	Calculate Chiron sign and degree from birth date Optional birth time to determine Chiron house Exact Chiron return dates NASA JPL Horizons ephemeris data Chiron retrograde calendar Birth date range 1900 to 2100 Chiron sign interpretations Historical timezone accounting Published methodology and accuracy verification
What makes it different	Instant calculation with no manual math required Privacy-first design with no student data storage Built specifically for teachers' workflow	Uses NASA JPL Horizons data verified to within a fraction of an arcsecond Open source code and ephemeris data on GitHub No account required and birth details not stored Transparent about calculation methods and limitations Handles uncertain birth times with clear flagging
Community votes	0	0
DR (Domain Rating by Ahrefs)	1 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	1	0
Citation Flow (Majestic)	20	16
Referring domains (Majestic)	4	2

4 details filled in for both companies.