Ember — Fasting Fat Burn Coach

Estimate your fat burn while fasting, with a goal timer and gentle hourly check-ins.

You started fasting for a reason. Ember keeps that reason in front of you. Ember is a fasting companion built for people who take their health seriously — not a calorie-counting app, not a subscription service, not a data harvest. Just honest, science-backed numbers that show you exactly what your body is doing while you fast, right inside your browser. What Ember tracks 🔥 Real-time fat burn Ember calculates your fat oxidation rate hour by hour using your personal metabolic profile — age, weight, height, sex, and ethnicity. Not a generic estimate. Your numbers. ⚗️ Ketone intensity See exactly where you are on the ketosis spectrum — from trace ketones at 8 hours to deep nutritional ketosis beyond 24. Ember shows you which phase you're in and how far the next milestone is. 📉 Glycogen depletion Watch your glycogen stores draw down in real time. When they empty, fat burn peaks. Ember shows you exactly how close you are to that crossover point. 🧬 Body composition Your BMI, estimated body fat percentage, and resting metabolic rate — calculated from your profile, updated as you update your stats. 🏃 Activity logging Log a run (time + distance in km or mi) or a weights session (in 15-minute marks). Ember adds those calories to your burn total automatically — no guessing. 📊 Fasting history Every completed fast is saved locally. Charts show your fat burned per fast, cumulative fat loss over time, and how your fast durations trend. Progress you can actually see. The science behind it Most fasting apps use a flat BMR and call it a day. Ember uses a revised fat oxidation model based on respiratory quotient (RQ) research — fat burn ramps slowly through the first 12 hours, accelerates through 16–18 hours, and dominates after 24. Protein catabolism (gluconeogenesis) is tracked separately and peaks at 24 hours before dropping as ketones spare muscle tissue. TDEE accounts for your sedentary baseline plus any activities you log. It's not perfect — no app is. But it's significantly more accurate than the generic models most trackers use. Your data stays yours No account. No server. No cloud sync. Everything — your profile, your history, your activity log — lives in your browser's local storage. Ember never sees it. Nobody does. Who this is for Ember is for people who are actively working on themselves. If you fast regularly — whether it's 16:8, OMAD, extended fasts, or anything in between — and you want more than a timer telling you when to eat, Ember was built for you. This extension comes from the same place you're in. The journey to understand your body, to push past the discomfort, to see real change. Ember is the tool I wished I had when I started. — bodyedit How to use 1. Click the 🔥 Ember icon in your browser toolbar 2. Enter your profile (takes 30 seconds) 3. Hit Start Fasting Now, open the full dashboard from the sidebar icon for detailed stats, activity logging, and your history That's it — Ember runs quietly in the background Privacy policy: Ember stores all data locally in your browser using Chrome's built-in storage API. No data is transmitted to any external server.