Kōōihaus™ vs PlainAstro

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

Kōōihaus™ compared with PlainAstro
Detail	Kōōihaus™	PlainAstro
What it does	Free paint coverage calculator for interior and exterior painting projects	Free birth chart calculator and astrology explained in plain words
Stage	Established	Not given
Founded	2021	Not given
Based in	US	GB
Pricing model	Free	Freemium
Pricing	Not given	Free birth chart calculator with no sign-up required. Full birth chart reading: $12. Personal 2027 astro calendar: $15.
Key features	Interior paint calculator Exterior paint calculator Metric and imperial units Primer calculation option Ceiling painting option Gable area calculation for exterior Instant results display	Accurate planetary positions checked against Swiss Ephemeris within an arc-minute 34,000 birth places with historical time zones Big Three calculator for Sun, Moon and rising signs Rising sign calculator with planetary house system Saturn return calculator Black Moon Lilith calculator Nakshatra calculator for Vedic astrology 2027 sky forecast with Mercury retrograde and eclipse dates All 12 houses explanations Free weekly astrology email by Sun sign
What makes it different	Handles complex calculations like doors, windows, and multiple stories automatically Works for both interior and exterior projects	No jargon or mystical fog Honest explanations without flattery Verified against Swiss Ephemeris for accuracy Everyday examples in plain language No sign-up required for basic calculator
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	21 +1 (up) since last check	30 +4 (up) since last check
Trust Flow (Majestic)	4	1
Citation Flow (Majestic)	23	17
Referring domains (Majestic)	37	5

5 details filled in for both companies.

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