Fastly - Fast Timer & Tracker

Intermittent fasting, without the clutter.

Fastly is a clean, private fasting timer built for people who want to stick to 16:8, OMAD, or any plan they choose — with beautiful widgets, real-time zone tracking, and zero ads or accounts.

Start a fast in one tap. Watch your body move through five fasting zones — from catabolism to deep autophagy. Build streaks, earn badges, and see your progress in charts that actually make sense.

FASTING, YOUR WAY
• Pick from 16:8, 18:6, 20:4, OMAD, 5:2, or build a custom plan
• Live circular timer with elapsed, remaining, and target
• Edit past fasts or log a forgotten one manually
• End a fast by voice with the Siri shortcut

SEE YOUR BODY'S RESPONSE
• Five fasting zones: Anabolic, Catabolic, Fat Burning, Ketosis, Autophagy
• Clear guide explains what's happening at each stage
• Gentle notifications when you enter a new zone

STAY MOTIVATED
• Streaks and weekly summaries
• 20 unlockable badges for consistency and milestones
• Calendar heatmap shows every fast at a glance
• Full history with notes on each session

TRACK YOUR WEIGHT
• Log in kg or lbs in one tap
• Visualize trends over weeks, months, or years
• Combined timeline of fasts and weight changes

WIDGETS + LIVE ACTIVITIES
• Home Screen widgets in Small, Medium, and Lock Screen sizes
• Live Activity keeps your fast visible on the Lock Screen and Dynamic Island
• Real-time countdown and zone status — no need to open the app

YOUR DATA STAYS YOURS
• Optional iCloud sync across iPhone and iPad
• No account, no ads, no tracking
• CSV export anytime (Pro)

FASTLY PRO
Unlock the full experience:
• Unlimited history (free tier shows last 30 days)
• Widgets
• Trend, Eating Window, Fasting Pattern, and Weight charts
• 30-day and yearly insights
• CSV export of all your data

PRIVACY FIRST
Your data lives on your device (and optionally your private iCloud). We don't collect, sell, or share anything. Ever.