Make Every Eating Window Count
Nail your macros and protein during your eating window. AI nutrition coaching built for intermittent fasting — so you protect your progress, not just your fast.
Download on the App Store★★★★★ 4.8 · 10,000+ downloads
Intermittent fasting works best when your eating window is nutritionally optimized — not just calorie-restricted. The challenge is fitting enough protein and the right macros into a shorter window without over- or under-eating. Calculorie was built for exactly this.
Snap your first meal of the window and see instantly whether you're on track for protein, calories, and fat targets. The AI coach reviews your window at the end of the day and tells you what to adjust tomorrow — whether that's more protein at lunch, less fat at dinner, or better hydration timing. You keep the benefits of fasting and compound them with precise nutrition.
Instant calories and protein.
Snap your meal and see the full nutritional breakdown in seconds — no manual entry.
Optimize your eating window.
Know exactly what to eat to support fat loss and muscle during your window.
Daily hydration and macro advice.
AI reviews your eating window and tells you what to adjust for better results.
Protect your fasting progress.
Track every meal so you know your window is working for your goals.
"I fast daily and this app is perfect. I know exactly what I'm eating in my window."
App Store · ★★★★★
"Used to break my fast without thinking. Now I snap a photo and see if it fits my goals."
App Store · ★★★★★
"The AI daily summary tells me if my eating window was optimized. Really useful."
App Store · ★★★★★
Intermittent Fasting & Nutrition — Common Questions
What should I eat to break my fast?
Break your fast with protein-first meals — eggs, chicken, Greek yogurt, or legumes. This protects muscle and stabilizes blood sugar. Avoid high-sugar foods as your first meal. Calculorie shows your protein and calorie breakdown for each meal so you can confirm your window starts well.
How many calories should I eat in a 16:8 eating window?
Your calorie target is the same regardless of fasting schedule — it's based on your TDEE (total daily energy expenditure) and your weight goal. With a 16:8 window, you simply fit those calories into 8 hours. Calculorie tracks your running total throughout the window.
Can I lose muscle while intermittent fasting?
Only if protein is too low. Hitting 1.6–2g of protein per kg of body weight while fasting protects muscle. The challenge is getting enough protein in a shorter window — Calculorie alerts you mid-window if you're falling behind on protein.
Does coffee or tea break a fast?
Plain black coffee and unsweetened tea don't meaningfully break a fast — they contain near-zero calories. Adding milk, sugar, or cream does. Calculorie logs drinks too, so you can track exactly what goes into your window.
How do I know if my eating window is working?
Track for 2 weeks: log everything you eat in the window, monitor your weekly weight average, and check your protein totals. Calculorie's AI reviews your window each day and tells you if your nutrition supports your fasting goals.