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Why every fitness app makes TDEE confusing (and my free fix)

A developer built FreeTDEE.com, a free total daily energy expenditure (TDEE) calculator that uses the Mifflin-St Jeor formula to provide maintenance, cutting, and bulking calorie targets without requiring an account or email. The tool was built in about three hours using Next.js and Cloudflare Pages, and stores data locally in the browser.

read1 min views1 publishedJun 28, 2026
Why every fitness app makes TDEE confusing (and my free fix)
Image: Dev.to

I've been tracking calories for 2 years and every TDEE calculator I used asked for my email or pushed a premium plan. So I built my own.

FreeTDEE.com calculates your daily calorie needs using the Mifflin-St Jeor formula. Pick your activity level, get your maintenance, cutting, and bulking targets instantly.

No app. No account. Data stays in your browser's localStorage. Built with Next.js + Cloudflare Pages in ~3 hours using AI.

source & further reading
dev.to — original article Building a Type-Safe API Layer in Next.js App Router With Zod and Server Actions 80 Impressions. Every Visible One Is for a Company I Invented in a TypeScript File. Short, Easy, Great!
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