Fastly – Intermittent Fasting

Fastly is a clean, private fasting timer for 16:8, 18:6, OMAD, and custom schedules—without ads, accounts, or distractions.

Start a fast with one tap, adjust your start or end time when needed, and see your elapsed time, remaining time, and planned finish at a glance. Fastly keeps the experience focused while giving you the tools you need to understand your routine and track your progress.

FOLLOW YOUR FAST

See estimated fasting phases based on your elapsed fasting time, including digestion, fat burning, ketosis, and autophagy. Upcoming phase markers make it easy to see what comes next during your fast.

TRACK YOUR PROGRESS

Review your complete fasting history through clear statistics, charts, and progress insights. Set weight and body fat goals, and optionally connect Apple Health to keep your measurements organized.

STAY ON TRACK EVERYWHERE

Follow your fasting status from your iPhone, Apple Watch, Home Screen widgets, and complications. Smart reminders help you stay aware of fasting goals and eating windows without unnecessary interruptions.

KEY FEATURES

• Real-time fasting timer with elapsed and remaining time
• Planned fasting end time displayed at a glance
• 14:10, 16:8, 18:6, 20:4, OMAD, and custom plans
• Estimated fasting phases for digestion, fat burning, ketosis, and autophagy
• Upcoming fasting phase markers
• Complete fasting history with statistics and charts
• Weight and body fat goals with progress benchmarks
• Apple Health integration for weight and body fat
• Apple Watch app and complications
• Home Screen widgets for quick progress checks
• Smart fasting and eating-window reminders
• Optional private iCloud synchronization
• Dark mode and a clean, focused interface

PRIVATE BY DESIGN

No ads. No third-party analytics. No developer data collection. Your fasting and health information stays on your devices and, when optional synchronization is enabled, in your private iCloud account.

IMPORTANT NOTE

Fasting phases are estimates based on elapsed time and can vary from person to person. Fastly is intended for general wellness and fasting tracking only. It does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before making medical or dietary decisions.