Period Tools vs Square Footage Calculator

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

Period Tools compared with Square Footage Calculator
Detail	Period Tools	Square Footage Calculator
What it does	Free, accurate cycle and period predictor	Measure rooms and plan DIY flooring projects with feet, inches and metric units
Stage	Startup	Not given
Founded	2026	Not given
Based in	Not given	Not given
Pricing model	Freemium	Free
Pricing	All calculators and guides are free. Period Tools Pro (optional): $4.99/month or $19.99/year.	Not given
Key features	Predicts next 6 periods Calculates ovulation day Identifies fertile window Private on-device tracking Cloud sync for Pro subscribers No signup required	Calculate area in feet, inches, decimal feet, meters and centimeters Support for rectangular, L-shaped, circular and triangular rooms Add up to 20 rooms together Automatic unit conversion between feet, inches and metric Flooring calculator for waste allowance and whole-box rounding Handles closets, alcoves and cutouts View formulas and assumptions No account required Fractional inches support
What makes it different	No data collection or server storage Uses standard medical calculation methods Honest about limitations and accuracy No aggressive marketing tactics	Correctly handles feet and inches together without requiring manual conversion Includes measuring diagram for L-shaped rooms Explains the difference between measured area, waste allowance and whole-box rounding Calculations stay private in your browser with no account needed
Community votes	0	0
DR (Domain Rating by Ahrefs)	14 −1 (down) since last check	14 no change since last check
Trust Flow (Majestic)	20	7
Citation Flow (Majestic)	9	16
Referring domains (Majestic)	77	23

4 details filled in for both companies.

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