Our Story
About FastingCalc
We built this because we were tired of fasting apps charging $20–$30 per month, locking you out after 7 days, and storing your personal health data on their servers.
Why We Built This
FastingCalc started as a simple personal project — a spreadsheet for calculating eating windows. After sharing it with friends who were frustrated by the same paywalled apps, we decided to build a proper, public tool.
Our philosophy is simple: health tools should be free, fast, and honest. Every calculation runs entirely in your browser. We collect no personal data. We store nothing on our servers. Your fasting schedule belongs to you.
We are not a startup. We are not VC-funded. We are independent developers who fast, and we built the tool we wished existed.
🧬 Scientific Standards
Every health claim on FastingCalc is linked to a peer-reviewed source — PubMed, Mayo Clinic, NIH, or major medical journals. We use the Mifflin-St Jeor BMR equation (the most accurate validated formula, per Mifflin et al., JADA 1990) for all calorie calculations.
🔒 Privacy First
FastingCalc runs entirely client-side. No data is ever sent to our servers. Your weight, age, schedule, and fasting history (stored in localStorage for the timer) never leave your device. We use basic analytics (Google Analytics, anonymised) to understand which tools are most useful.
📬 Contact
Questions, corrections, or feedback: hello@myfastingcalc.com