Period Tools vs TDEE 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 TDEE Calculator
Detail	Period Tools	TDEE Calculator
What it does	Free, accurate cycle and period predictor	Free online calculator to estimate your Total Daily Energy Expenditure and daily calorie needs
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	Input body statistics including age, gender, height, and weight Mifflin-St Jeor equation for BMR estimation Personalized maintenance calorie estimates Macro recommendations based on calculated TDEE Calorie targets for weight loss and muscle gain
What makes it different	No data collection or server storage Uses standard medical calculation methods Honest about limitations and accuracy No aggressive marketing tactics	Data-driven approach using the Mifflin-St Jeor equation for accuracy Personalized calculations tailored to individual body stats and activity level Supports both weight loss and muscle gain planning Free and easy-to-use online tool
Community votes	0	0
DR (Domain Rating by Ahrefs)	15 no change since last check	38 no change since last check
Trust Flow (Majestic)	20	13
Citation Flow (Majestic)	9	30
Referring domains (Majestic)	77	167

4 details filled in for both companies.