FastFlow: Fasting & Water App
Calorie Counter & Fast Timer
Free · In‑App Purchases · Designed for iPad
Track fasts, count calories with AI & stay hydrated — all in one app! Snap a photo for instant calorie estimates. Fasting zones, water reminders & AI coach included.
FastFlow is the smart intermittent fasting tracker, AI calorie counter, and water tracker that helps you lose weight, burn fat, and stay hydrated — all with AI-powered guidance.
Track your fasts. Count your calories with AI. Stay hydrated. All in one app.
WHY FASTFLOW?
Most health apps make you choose — fasting OR calorie counting OR water tracking. FastFlow combines intermittent fasting, AI calorie tracking, water intake tracking, and an AI coach in one simple app — so you actually stick with it and see results.
AI CALORIE COUNTER & FOOD TRACKER
Snap a photo of your meal and let AI estimate calories, macros, and nutrition instantly. No more manual searching through food databases.
• AI photo calorie estimator — just snap and track
• Automatic macro breakdown (protein, carbs, fat)
• Food scanner with AI-powered nutrition recognition
• Daily calorie tracker with intake history
• Set calorie goals and track your deficit
• Works with any meal — home cooked or restaurant
SMART FASTING TIMER
Start your fast with one tap. Choose from popular fasting protocols:
• 16:8 — The classic. 16 hours fasting, 8 hours eating
• 18:6 — Intermediate level for faster results
• 20:4 — The warrior protocol for experienced fasters
• Custom — Set your own fasting and eating windows
Watch your body enter different fasting zones in real time:
• Fed State (0-4 hours) — Digestion and energy storage
• Fat Burning (4-12 hours) — Your body switches to burning fat
• Ketosis (12-18 hours) — Deep fat burning and mental clarity
• Autophagy (18+ hours) — Cellular repair and regeneration
Your fasting timer keeps running even when the app is closed. Get notified when you hit each zone and when your fast is complete.
WATER TRACKER & HYDRATION REMINDER
Staying hydrated is just as important as fasting. FastFlow tracks your daily water intake and sends smart reminders so you never forget to drink water.
• Set your daily water goal
• Quick-add buttons for common amounts
• Track glasses, bottles, or custom amounts
• Smart hydration reminders throughout the day
• See your daily and weekly water intake history
MEET YOUR AI FASTING COACH
Confused about fasting? Ask your AI coach anything:
• "Can I drink coffee during my fast?"
• "What should I eat to break my fast?"
• "Which fasting protocol is best for weight loss?"
• "How do I handle hunger during a fast?"
Get instant, personalized answers based on your fasting history and goals.
TRACK YOUR PROGRESS
• Fasting streak counter
• Weekly and monthly summaries
• Time spent in each fasting zone
• Weight tracking with trend graphs
• Water intake history and streaks
• Personal records and milestones
FREE TO USE, PREMIUM TO UNLOCK MORE
FastFlow is free with everything you need to start:
• 3 fasting protocols (16:8, 18:6, 20:4)
• Water tracking with reminders
• Fasting timer with zone indicators
• 3 AI coach messages per day
• Streak tracking and basic stats
Upgrade to FastFlow Premium:
• All fasting protocols including custom
• Unlimited AI coach conversations
• Advanced analytics and weekly reports
• Personalized recommendations
• Custom water goals and smart reminders
• Streak protection (Joker Days)
• Ad-free experience
Subscription: FastFlow Premium is available as an auto-renewing subscription. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage and cancel subscriptions in your Apple ID Account Settings.
Disclaimer: FastFlow is not a medical app and does not provide medical advice. AI calorie estimates are approximate and may be inaccurate. Consult a healthcare professional before starting any fasting, diet, or weight loss program. Not intended to diagnose, treat, cure, or prevent any disease.
Privacy Policy: https://fastflowai.fit/privacy-policy
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
The developer, Lit Games Publishing LTD, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Purchases
- Location
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- LIT GAMES PUBLISHING LTD
- Size
- 46.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Advertising
Health or Wellness Topics
- In-App Purchases
Yes
- FastFlow Weekly Premium $1.99
- FastFlow Premium — Yearly Sub $29.99
- FastFlow Premium — Monthly Sub $4.99
- Copyright
- © 2026 Lit Publishing Ltd.