JustFast vs Abstia

Fasting is a beautifully simple intermittent-fasting timer that does one thing well: it tracks your fast. No goals to hit. No streaks to protect. No accounts, no ads, no clutter. Just tap once to begin, and a calm live timer counts your fast while a glowing ring fills toward the next stage your body moves through. WHY IT'S DIFFERENT Most fasting apps pile on dashboards, reminders, and pressure. This one strips fasting back to its essence — a clear timer you can glance at and put away. It's designed to feel quiet and focused, not gamified. WHAT YOU GET • One-tap start and stop, with a big, satisfying button • A live timer that keeps perfect time across restarts, time-zone changes, and daylight saving • Metabolic milestones — the ring fills toward the next stage (blood sugar settling, glycogen burning, fat burning, ketosis, autophagy, and more) • Tap any milestone for an honest, plain-language explanation of what's happening in your body • Forgot to start the timer? Just tap the ring to fix your start time. Forgot to stop? End your fast at the right time after the fact. • An ongoing notification shows your current duration at a glance • A simple history of past fasts — swipe to delete • 18 languages and a clean dark design HONEST BY DESIGN The milestone descriptions are written plainly and honestly. Where the science is still early or based mostly on animal research, we say so. This app is a timer and an educational companion — not medical advice. PRIVATE BY DEFAULT Your data stays on your device. There are no accounts, no sign-ups, no tracking, and nothing is uploaded. Fasting works for 16:8, OMAD, alternate-day, extended fasts, or any schedule you like — because it never forces a schedule on you. Note: Fasting is not a medical device and does not provide medical advice. Talk to a healthcare professional before starting any fasting regimen, especially if you are pregnant, nursing, taking medication, or have a medical condition.

Intermittent fasting, without the guesswork. Abstia is a privacy-focused intermittent fasting tracker that shows you what your fast is actually doing - featuring a one-tap timer, real-time metabolic stage tracking, and an AI coach that learns from your history. No ads. No paywalls. Works fully offline. WHY ABSTIA IS DIFFERENT Most fasting apps just count down a clock. Abstia shows you what’s happening inside your body, helping you understand each phase of your fast from fat-burning to autophagy. REAL-TIME METABOLIC STAGE TRACKING • Visual metabolic ring guides you through each stage: fed state, post-absorptive, fat-burning, ketosis, and deep ketosis. • Know exactly when you enter ketosis and when autophagy begins. • Gain actionable insights into your body's physiology. FASTING TIMER & CUSTOM SCHEDULES • Start any fast in a single tap. • Choose popular protocols: 16:8, 18:6, 20:4, OMAD, ADF, or custom windows. • Flexible timer editing lets you adjust start and end times anytime. PERSONALIZED FASTING COACH • Learns from your streaks, energy levels, and consistency to give custom advice. • Celebrates your milestones and helps you get back on track when you stumble. BIOFEEDBACK & HEALTH LOGGING • Track mood, hunger types, and energy levels after each fast. • Uncover patterns: find out which fasting window yields your peak focus and energy. • Sync seamlessly with Apple Health to pull in weight, calories, and macros automatically. • View your estimated TDEE and calorie balance without manual logging. HISTORY, HEATMAP & STREAKS • Visualize your journey with a calendar heatmap. • Track your longest fast, current streaks, and monthly consistency. WIDGETS & APPLE WATCH • Track your fast directly from Home Screen and Lock Screen widgets. • Stay updated on your current metabolic stage via the Apple Watch companion app and Watch complications. OFFLINE-FIRST & 100% PRIVATE • Track fasts anywhere, even without internet access. • No account required to start. • Your data remains yours: zero ads, zero data selling, and no third-party tracking.