16:8 fasting
Start the most popular intermittent fasting schedule with a timer that clearly shows fasting and eating windows.
⚡ Intermittent fasting tracker
Intermittent Fasting Timer for iPhone
Track fasting, hydration and weight with Apple Health
Fast.IO helps you follow 16:8 fasting, 18:6 schedules, OMAD, and custom fasting plans with a clear timer, progress rings, and simple daily tracking.
Fast.IO is a wellness and habit-tracking app. It does not provide medical advice.
Intermittent Fasting Timer
Use a beautiful circular fasting timer to follow your fasting progress in real time across common fasting schedules.
18:6 fasting
Push beyond beginner routines with a focused six-hour eating window and detailed progress milestones.
OMAD timer
Track one meal a day plans with a longer fasting window, visible overtime, and session history.
Understand Fasting Phases
Fast.IO visualizes the metabolic phases of fasting so you can understand what happens in your body during a session.
- Blood sugar decrease
- Fat burning
- Metabolic switch
Track Weight with Apple Health
Fast.IO integrates with Apple Health so you can monitor weight changes during fasting and review long-term progress on iPhone.
This makes Fast.IO a practical Apple Health fasting tracker for users who want fasting data and weight trends in one place.
Hydration Tracking
Stay hydrated during fasting and track your water intake with a simple hydration tracker designed for quick daily logging.
- Quick-add hydration entries
- Daily water goals
- Hydration progress during fasting windows
Fasting Statistics
Analyze your weekly stats, monthly stats, and long-term fasting trends to understand consistency and progress over time.
- Weekly stats
- Monthly stats
- Long-term fasting trends
Fasting History
Review every fasting session with duration, fasting interval, and optional mood tracking so your history remains useful, not just decorative.
- Fasting duration
- Fasting interval
- Mood tracking
Download Fast.IO on the App Store
Start free, build your fasting routine, and unlock advanced tracking features whenever you need more depth.
📱 Featured Screens
Fast.IO includes screenshot-ready fasting views with descriptive alt text to explain each part of the experience.
Intermittent fasting timer
Track your active session with a clear progress ring and milestones.
Fasting phases tracker
See how your fasting session moves from early hours into deeper phases.
Fasting statistics tracker
Review streaks, trends, and long-range progress in one place.
Apple Health weight tracking
Connect weight progress with your fasting history and routine.
Explore More Fast.io Pages
Intermittent Fasting App
A dedicated overview of the Fast.IO app for iPhone, features, and App Store download details.
Fasting Timer
Learn how the fasting timer supports 16:8, 18:6, OMAD, and custom windows with real-time progress.
16:8 Fasting
See how Fast.IO supports the 16:8 fasting method with a simple timer and daily history.
Apple Health Fasting
Review how weight tracking and fasting progress work together with Apple Health integration.
Fasting Tracker
Explore the full fasting tracker experience, including hydration, statistics, and history.
Fasting Blog
Read practical guides about intermittent fasting, weight loss, and how to build a sustainable routine.