Fastify - Intermittent Fasting

Fastify is your all-in-one intermittent fasting tracker built for lasting weight loss. Pick a plan — 16:8, 18:6, 20:4, OMAD, or custom — and start your first fast in one tap.

Unlike apps that focus on counting calories, Fastify helps you lose weight by timing your meals. Based on your BMI and goals, Fastify builds a personalized fasting schedule that fits your life — whether you're a complete beginner, an experienced faster, or somewhere in between.

★ PERSONALIZED FASTING PLANS ★

Choose the fasting plan that matches your body and lifestyle:

- 16:8 fasting — the most popular intermittent fasting schedule for weight loss
- 18:6 fasting — a more advanced fasting window for faster fat burn
- 20:4 fasting — the Warrior Diet, one meal and a small snack
- OMAD — one meal a day for maximum results
- 14:10 fasting — perfect for intermittent fasting for beginners
- 5:2 fasting — flexible weekly fasting plan
- Custom plans — build your own fasting schedule

Our built-in fasting plan calculator and BMI calculator create a schedule tailored to you. No guesswork, no one-size-fits-all templates.

★ SIMPLE FASTING TIMER ★

Start and stop your fast with a single tap. Watch your fasting window and eating window update in real time. Track your fasting streak and see how your consistency builds over days, weeks, and months. Timely reminders for both your fasting start and eating window keep you on schedule without being pushy.

★ WEIGHT TRACKING THAT WORKS ★

Log your weight and watch clear progress charts connect your fasting effort to real results. Fastify includes a weight loss journal, a BMI calculator, and body composition tracking — all in one place. See exactly how 16:8, 18:6, or OMAD is working for your body.

★ HYDRATION SUPPORT ★

Stay on track during your fast with a built-in hydration tracker and smart drink reminders. Log water intake, set daily hydration goals, and keep your energy steady throughout your fasting window.

★ SCIENCE-BACKED APPROACH ★

Fastify is built around widely studied fasting methods that support autophagy, ketosis, metabolic reset, and improved insulin resistance. Our approach aligns with circadian fasting research and time-restricted eating principles — designed for sustainable, long-term weight loss, not crash dieting.

★ WHO FASTIFY IS FOR ★

- Intermittent fasting for beginners — simple onboarding, clear guidance
- Intermittent fasting for women — plans that work with your body
- Intermittent fasting for men — straightforward, results-focused tracking
- Weight loss for women over 40 — gentle plans suited to perimenopause and menopause
- Fasting for PCOS — flexible schedules that support hormone balance
- Anyone ready to lose weight without counting calories

★ WHY CHOOSE FASTIFY ★

- Count hours, not calories
- Personalized to your body — not a generic template
- All four major plans supported (16:8, 18:6, 20:4, OMAD)
- Works for total beginners and experienced fasters
- Weight tracker, fasting timer, water log, streak tracking — all in one app
- Clean interface with no distractions
- Gentle reminders, never pushy

★ JOIN A 30-DAY FASTING CHALLENGE ★

Stay motivated with seasonal challenges — New Year Fasting Reset, Spring Metabolic Reset, Summer Body Challenge. Build streaks, hit milestones, and turn small daily habits into lasting change.

Start your fasting journey with Fastify today — pick a plan, tap start, and watch the weight come off the natural way.

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Fastify is for informational purposes and is not medical advice. Please consult a healthcare provider before starting any fasting program, especially if you are pregnant, breastfeeding, diabetic, under 18, or taking medication.

Recent changes:
⚡ Improved performance for a faster and smoother experience
🎨 Enhanced design for a cleaner and more modern look
👍 Made the app easier to use with better navigation
🛠️ Fixed major bugs and errors
💧 Added a new Water Streak System to help you stay consistent