CalculatorFox vs CalculateMyHeartRate

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

CalculatorFox compared with CalculateMyHeartRate
Detail	CalculatorFox	CalculateMyHeartRate
What it does	Free online calculators with step-by-step workings and cited sources, embeddable on any website	Free Karvonen formula heart rate zone calculator
Stage	Startup	Established
Founded	2026	Not given
Based in	GB	Not given
Pricing model	Freemium	Free
Pricing	Free plan: all calculators with ads, 5 saved calculations, 1 private link. Personal: $29 USD/year or $5/month with unlimited saved calculations, no ads, PDF and CSV export. Advisor: $149 USD/year or $19/month with client-facing branding, scenarios grouped by client, one PDF per client, and priority	Not given
Key features	1,336 calculators across 23 categories Step-by-step calculation workings shown live Cited sources on every calculator page Save and compare scenarios side by side Embed calculators on your website with three lines of code Update shared figures once across all embeds Export results as PDF or CSV Reusable assumption profiles Private read-only links with expiration Client management and reporting features	Five personalized training zones based on heart rate reserve Accounts for resting heart rate and cardiovascular fitness Custom maximum heart rate input from multiple formulas No signup required, runs entirely in browser Weekly resting heart rate logging and progress tracking Zone-specific training guidance for different goals Shareable and printable zone results Embeddable calculator widget for websites
What makes it different	Visible calculation working for every result, so you can inspect the math rather than trust blindly Every calculator declares its method and sources in code with checked examples Free embedding with your own branding and no tracking of readers Similar calculators are consolidated to one preferred page to avoid duplicate search results	More accurate than age-only formulas, accounting for individual cardiovascular fitness Zones adapt as your fitness improves and resting heart rate drops Based on 1957 Karvonen research used by coaches and sports scientists Independent, no data collection or external servers No ads inside the calculator, free to use with optional embedding
Community votes	0	0
DR (Domain Rating by Ahrefs)	23 −1 (down) since last check	11 no change since last check
Trust Flow (Majestic)	24	19
Citation Flow (Majestic)	34	25
Referring domains (Majestic)	88	40

5 details filled in for both companies.

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