Period Tools vs Swim Converter

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 Swim Converter
Detail	Period Tools	Swim Converter
What it does	Free, accurate cycle and period predictor	Free NCAA-factor swim time converter for SCY, SCM and LCM pools
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	Instant conversion between SCY, SCM and LCM courses Uses published NCAA conversion factors by event and gender No login or registration required Visible conversion factors and route displayed with results Truncates results to one hundredth of a second without rounding No conversion history stored
What makes it different	No data collection or server storage Uses standard medical calculation methods Honest about limitations and accuracy No aggressive marketing tactics	Built on published NCAA factors, not invented estimates Supports event-specific and gender-specific conversion factors for long-course Transparent methodology with visible factors and honest labeling
Community votes	0	0
DR (Domain Rating by Ahrefs)	15 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	20	8
Citation Flow (Majestic)	9	19
Referring domains (Majestic)	77	9

4 details filled in for both companies.