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Fasting Guide 8 min read
Beginner's Guide to 16:8 Intermittent Fasting
Everything you need to know to start the most popular fasting protocol. Tips, schedules, and what to expect in your first week.
AI-Powered Health Coach
Smart Fasting.
Stay Hydrated.
Transform your health with AI-powered intermittent fasting, smart hydration tracking, calorie scanning, and personalized coaching. All in one beautifully designed app.
5
Fasting Protocols
AI
Smart Coach
Free
To Download
Current Fast
16:42
of 16:00 hours
Fat Burn
1.5L
Water
85
Score
Everything you need to transform your health
FastFlow AI combines intelligent fasting tracking, hydration management, and AI-powered coaching into one seamless experience.
Smart Fasting Timer
Track your fasting windows with a beautiful timer. Support for 16:8, 18:6, 20:4, 23:1 (OMAD), and 14:10 protocols.
AI Fasting Coach
Get personalized advice from your AI coach. Ask questions about your fast, nutrition, hydration, and get instant expert guidance.
Hydration Tracking
Never forget to drink water. Smart reminders, daily goals, and intuitive logging keep you perfectly hydrated throughout the day.
AI Food Scanner
Snap a photo of your meal and let AI analyze the calories instantly. No manual entry needed. Track your nutrition effortlessly.
Weight Tracking
Log your weight, set goals, and visualize your progress with beautiful charts. See trends and celebrate milestones.
Fasting Zones
See exactly which metabolic zone you are in. From anabolic to fat burning to deep ketosis — watch your body transform.
Streaks & Scores
Build fasting streaks, earn daily health scores, and stay motivated with achievements. Your consistency, rewarded.
5 Languages
Available in English, German, French, Italian, and Spanish. Your health journey, in your language.
Choose your fasting protocol
From gentle 14:10 to intense OMAD. Find the schedule that fits your lifestyle.
14:10
Beginner
Gentle and easy to maintain. Perfect starting point.
Premium
Most Popular
16:8
Popular
Most popular protocol. Great balance of results and ease.
Free
18:6
Moderate
Enhanced fat burning. Good for experienced fasters.
Free
20:4
Advanced
Warrior Diet. Intense results for dedicated fasters.
Premium
23:1
Expert
OMAD — One Meal a Day. Maximum fasting benefits.
Premium
Start in 4 simple steps
Getting started with intermittent fasting has never been easier.
Step 01
Download the App
Get FastFlow AI free from Google Play. No sign-up required to start.
Step 02
Set Your Protocol
Choose your fasting protocol — 16:8 for beginners or go advanced with OMAD.
Step 03
Start Fasting
Tap to begin your fast. Track your zones, hydration, and get AI coaching in real-time.
Step 04
See Results
Watch your streaks grow, weight drop, and health score improve day by day.
Loved by thousands
Join the community transforming their health with FastFlow AI.
4.8|2,500+ reviews
“FastFlow AI made intermittent fasting so simple. The AI coach kept me motivated, and the hydration reminders were a game-changer. Best fasting app I have tried!”
Sarah M.
Lost 12kg in 3 months
“The fasting zones feature is brilliant. Knowing exactly when I'm in fat burn or ketosis keeps me going. The food scanner saves me so much time logging meals.”
James T.
Fasting for 6 months
“Love that it's available in Spanish! The streak system is so motivating. I have never been this consistent with any health app before. Highly recommend.”
Maria L.
Health enthusiast
“The daily health score gives me something to aim for every day. Water tracking with reminders has improved my skin and energy levels dramatically.”
David K.
Lost 8kg in 2 months
“Finally an app that supports the 23:1 protocol properly! The AI coach understands advanced fasting and gives great advice. Worth every penny of premium.”
Anna P.
OMAD practitioner
“I recommend FastFlow AI to all my clients. The combination of fasting, hydration, and calorie tracking in one app is exactly what people need.”
Michael R.
Fitness trainer
Learn about fasting
Expert guides to help you on your fasting journey.
H
Hydration 6 min read
How Much Water Should You Drink While Fasting?
Staying hydrated during fasting is crucial. Learn the science behind hydration and how to optimize your water intake for better results.
S
Science 7 min read
5 Fasting Zones Explained: From Fed State to Deep Ketosis
Understanding the metabolic zones your body goes through during a fast. Know exactly when fat burning kicks in.
Free to download. Start today.
Ready to transform
your health?
Join thousands already using FastFlow AI to lose weight, stay hydrated, and build healthy fasting habits. Download free and start your first fast today.