DisplayMath 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.

DisplayMath compared with birthchart.io
Detail	DisplayMath	birthchart.io
What it does	Free screen size calculator that compares TVs and monitors to scale	Birth chart calculator
Stage	Not given	Not given
Founded	Not given	Not given
Based in	RO	Not given
Pricing model	Freemium	Free
Pricing	Free calculators; optional Planning Pack €9 one-time purchase	Not given
Key features	Side-by-side display comparison at true scale Calculate physical dimensions from resolution and diagonal Pixel density (PPI) calculations Field of view angle visualization Preset lists of monitors, TVs, laptops and phones Pixels per degree (PPD) calculator TV mounting height calculator Curved monitor radius support Optional Planning Pack PDF export	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	Draws every display to scale for visual comparison instead of guessing Uses THX and pixel-per-degree references for viewing recommendations Augmented reality shows actual screen size on your wall Free to use with no account or signup required Independent with no manufacturer influence on calculations	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)	1 no change since last check	2 no change since last check
Trust Flow (Majestic)	4	4
Citation Flow (Majestic)	24	12
Referring domains (Majestic)	18	3

4 details filled in for both companies.

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