Period Tools vs CalculCalories

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 CalculCalories
Detail	Period Tools	CalculCalories
What it does	Free, accurate cycle and period predictor	Free calorie calculator with TDEE, BMR, macros and nutrition tools based on published formulas
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	BMR calculation using Mifflin–St Jeor formula TDEE calculation with activity factors BMI and body composition tools Calories burned during exercise Food database with nutritional values AI meal recognition from photos or text Recipe nutrition calculator No account or signup required 41 different calculation tools
What makes it different	No data collection or server storage Uses standard medical calculation methods Honest about limitations and accuracy No aggressive marketing tactics	Published formulas with cited sources and no invented numbers Calculations run deterministically in TypeScript, not by language models Food database intentionally kept short to avoid generated content
Community votes	0	0
DR (Domain Rating by Ahrefs)	15 no change since last check	5 no change since last check
Trust Flow (Majestic)	20	7
Citation Flow (Majestic)	9	24
Referring domains (Majestic)	77	11

4 details filled in for both companies.