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Fastly: Intermittent Fasting icon

Fastly: Intermittent Fasting

By Micro App Digital

About this app

Lose weight and take control of your eating with Fastly — the complete intermittent fasting tracker that's actually free. Start a fast in one tap and watch a beautiful timer reveal exactly what your body is doing right now: fat-burning, ketosis, and autophagy. Follow any schedule (16:8, OMAD, 5:2 and more), track your weight and progress, build streaks, and stay motivated — with no $70/year subscription. Fastly is not a medical device and does not provide medical advice.

Features

Live Fasting Stages

  • Watch your body move through each stage as your fast progresses — fed, fat-burning, ketosis, autophagy, and growth hormone.
  • See exactly when you'll reach the next stage and what it does for your body — the motivation that gets you through the hard hours.

A Timer You Can Trust

  • One-tap start and stop, with a glowing ring that fills as you fast and shifts color with each stage.
  • Your elapsed time stays exact after backgrounding, a reboot, or a phone restart — because a wrong timer is the fastest way to quit.

Every Schedule, All Free

  • 16:8, 18:6, 20:4, OMAD (23:1), 14:10, 12:12, 5:2, Warrior, Circadian, and fully custom.
  • Beginner to advanced — switch anytime and set a recurring weekly plan.

See Your Results

  • Log your weight and watch the trend move toward your goal, with BMI and body measurements.
  • Fasting-hours charts, average fast length, and completion rate make your progress visible.

Stay Motivated

  • Build streaks, take on challenges, earn milestones, and beat your longest fast.
  • Visible investment in your progress is what keeps you coming back every day.

Water & Smart Reminders

  • Track hydration and get calm, motivating reminders for fast start and end and eating-window open and close.
  • Motivating nudges like "you'll reach ketosis in 1 hour" and gentle log-your-weight prompts.

Learn As You Fast

  • Built-in guidance on fasting benefits, what breaks a fast, and the science of the stages.
  • Beginner tips included — no paywall on the content that helps you understand what's happening.

Free, No Subscription

  • All fasting protocols, live stages, weight and progress tracking, streaks, challenges, water, reminders, and content are free.
  • No subscription and no "shell" free tier — with an optional one-time remove-ads upgrade if you'd like a clean screen.