I built Abstia because the fasting app I relied on stopped working. Crashes, lag, features locked behind paywalls — I just wanted a simple, reliable fasting timer that I could trust. So I built one for myself. Then I kept building.
Whether you're doing 16:8, OMAD, 18:6, or your first-ever fast, Abstia focuses on what actually matters: tracking your fast, understanding what's happening in your body, and building a sustainable habit — without ads, data mining, or nonsense.
What makes Abstia different:
METABOLIC STAGE TRACKING
Most fasting apps show a countdown. Abstia shows a real-time metabolic ring that tracks your body through each biological stage — from fed state through post-absorptive, ketosis, and deep ketosis. Know what your fast is actually doing.
FASTING TIMER & SCHEDULES
Start a fast in one tap. Choose from popular schedules like 16:8, 18:6, 20:4, and 24-hour fasts, or create your own custom fasting window. Edit start and end times if you forgot to hit stop.
COACHING THAT LEARNS FROM YOU
Not generic tips copied from a blog. Abstia's coach analyzes your actual fasting history - your streaks, mood trends, energy patterns, and consistency - then gives you advice that applies to your life. Celebrates your milestones. Nudges you when you fall off. Suggests the next challenge when you're ready.
BIOFEEDBACK & INSIGHTS
Log your mood, hunger type, and energy level after each fast. Over time, patterns emerge: Are you more energized on 18:6 days? Does weekend fasting feel different? See what works for your body.
WEIGHT & HEALTH DATA
Track your weight with trend lines and goals. Connect Android Health Connect to automatically pull in weight, active calories, and nutrition. See your estimated TDEE, calorie balance, and macronutrient breakdown - without manual food logging.
FASTING HISTORY & HEATMAP
All your fasts in a calendar heatmap view. See streaks at a glance. Track your longest fast. Monitor consistency over weeks and months.
HOME SCREEN WIDGETS
Check your fasting progress without opening the app. Native widgets for iOS and Android show your current fast, metabolic stage, and time remaining. Start or complete a fast right from your home screen.
WEAR OS COMPANION
View your fast on your wrist with a native Wear OS app and watch face complications.
OFFLINE-FIRST
Abstia works without internet. Your data lives on your device in a fast, reliable database. When you're online, it syncs securely across your devices. No loading spinners. No "please check your connection."
PRIVACY
Your health data is yours. Stored on your device first. Sync is optional and encrypted. No ads, no tracking, no selling your data. Ever.
DARK & LIGHT MODE
Follows your system preference, or set your own.
If you've been let down by other fasting apps, give Abstia a try. I think you'll notice the difference.