Intermittent Fasting Tracker

The intermittent fasting tracker that shows the biology happening inside you — Fed, Lipolysis, Ketosis, Autophagy — in real time. Ad-free fasting app.

Most fasting apps hand you a countdown clock and a streak to protect. Intermittent does something different: it shows you exactly which biological phase your body is in right now, and explains the science behind it — with cited primary sources, not marketing copy. If you've ever wondered how to track fasting properly, or what's actually happening during an easy fast, this is the fasting tracker built for that question.

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WHY FASTING WORKS
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Intermittent fasting works because of what happens between meals — not just the absence of food. As your fast progresses, your body moves through distinct phases: burning through glucose reserves, shifting into fat-burning lipolysis, entering ketosis, and eventually triggering autophagy — the cellular repair process linked to longevity and metabolic health. Understanding these transitions is what separates intentional fasting from guesswork. Intermittent maps every stage, so weight loss fasting and long-term health goals are grounded in mechanism, not motivation.

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KEY FEATURES
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★ PHASE-AWARE FASTING TIMER
A real-time timer that tracks six biological phases — Fed, Early Fasting, Lipolysis, Ketosis, Autophagy, and Deep Fast. Each phase links to a free science article with primary sources cited inline. No other fasting timer explains the why behind the clock.

★ EVERY FASTING PROTOCOL, ONE APP
Supports 12:12, 14:10, 16:8, 18:6, 20:4, OMAD (One Meal A Day), 36-hour, 48-hour, and 72-hour fasts. Whether you're starting an easy fast intermittent routine or running extended protocols, your schedule is here.

★ FREE FASTING SCIENCE LIBRARY
A full library of fasting articles — covering intermittent fasting, ketosis, autophagy, insulin response, and more — available without a subscription, without an account, and without a paywall. This is what intermittent fasting free actually means.

★ SMART HYDRATION TARGET
A science-backed hydration goal that adapts to your weight, sex, age, and the length of your planned fast. Staying hydrated during fasting intermittent protocols is one of the most overlooked variables — Intermittent calculates it for you.

★ WEIGHT & PROGRESS TRACKING
Log your weight after each fast and watch your trend over time. Insights include a streak heatmap, phase-reach history, and an estimated fat vs. glucose energy split per fast — so you can see the weight loss fasting progress that matters.

★ PRIVATE CIRCLE & END-OF-FAST REFLECTION
Share your fast with a small, private group. Responses are applause-only — no commentary, no comparison. End each fast with a mood check-in and personal notes. No leaderboards. No XP. No guilt mechanics.

★ HOME SCREEN WIDGET & CROSS-DEVICE SYNC
An Android home-screen widget keeps your fasting timer visible without opening the app. Cross-device sync means your data follows you — privately, without third-party trackers.

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WHO IT'S FOR
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Intermittent is built for adults who want to understand fasting — not be coached through it. If you follow research on metabolic health, read about longevity, or simply want a healthy fasting routine grounded in biology rather than a points system, this app was made for you. It works equally well for beginners starting their first 12:12 and experienced fasters running OMAD or extended protocols.

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HOW IT WORKS
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① Choose your fasting protocol — from an easy fast 12:12 to a 72-hour extended fast
② Start your timer and watch your biological phase update in real time
③ Tap any phase to read the science — then log your reflection when your fast ends

No account required to start. No subscription required to read the library.