Period Tools vs ToolExo

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 ToolExo
Detail	Period Tools	ToolExo
What it does	Free, accurate cycle and period predictor	Clear, privacy-first online tools
Stage	Startup	Not given
Founded	2026	Not given
Based in	Not given	US
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	130+ tools across 14 categories Transparent calculation methods with step-by-step explanations Practical guides linked to each tool
What makes it different	No data collection or server storage Uses standard medical calculation methods Honest about limitations and accuracy No aggressive marketing tactics	Clear explanations of methods and limitations for every tool Supporting guides explain related questions and link back to tools
Community votes	0	0
DR (Domain Rating by Ahrefs)	14 −1 (down) since last check	10 no change since last check
Trust Flow (Majestic)	20	7
Citation Flow (Majestic)	9	29
Referring domains (Majestic)	77	18

4 details filled in for both companies.