We borrowed a sprint-planning idea and pointed it at your calories. Eat, walk, ruck, live. At any moment of the day, CalBurndown shows you exactly how much budget you have left — and how to earn more.
Live demo · 5:30 PM
692 kcal left
BMR
2007
Active
309
Eaten
1220
Why other trackers fail
Manual logging is a chore.
Search, weigh, enter, repeat. Most users quit in 2–6 weeks.
Pulling out the camera ruins dinner.
Photographing your plate in front of friends? Awkward.
Bad math for big bodies.
At 6'4" and 220 lb, most apps underestimate your burn by hundreds of calories.
Every feature passes one test: what if the user never opens the app? Wherever possible, we work in the background and reconstruct your day later.
“Had a handful of almonds and a vanilla iced latte.” That's a log.
Take a normal photo of your dinner. Approve the AI estimate later, when nobody's watching.
Forgot to log? CalBurndown rebuilds your day from the places you stopped at.
Out of food calories at 5 PM? It tells you exactly how long a walk (or a ruck) buys you dessert.
Mifflin–St Jeor for BMR. Pandolf for rucking. Per-step burn scaled to your real weight.
Your location timeline and meals live in encrypted local storage. Cloud sync is opt-in.
Worked example
6'4", 220 lb, 41 yr male · 8,156 steps · 10 lb commuter pack · 500 kcal deficit goal
Newsletter
Short, honest, no hype. Why your TDEE calculator is wrong, what photo calorie counters get right, how to read a burndown chart. Free.
Free, weekly. We never share your email.
Calories first; macros optional. We focus on the daily deficit because that's what moves the scale. Protein and fat overlays are available for power users.
iPhone: open calburndown.com in Safari → tap the Share button → Add to Home Screen. Android: open calburndown.com in Chrome → tap the ⋮ menu → Install app. Once installed, it opens full-screen and supports push notifications. Step-by-step: /help/install-iphone or /help/install-android. Native iOS/Android shells with watch sync are coming separately.
Yes — once the iOS and Android apps ship. Watch sync is a native-OS integration, so it lives in the mobile apps (currently in development). The plan: read steps, workouts, heart rate, and body weight from Apple HealthKit and Google Health Connect. Fitbits that sync to Health Connect will be picked up on Android.
Only the food photo you submit, with EXIF and GPS stripped. If you opt in, we can also send the name of the restaurant you're at right now — handy for getting a chain-menu-accurate calorie estimate. Your background location timeline is never uploaded.
The burndown chart doesn't care. You can frontload dinner, skip breakfast, or eat once a day — the daily total is what matters.
Free to try in your browser. Mobile apps coming soon.
Open CalBurndown →