LeanFast-Fasting & Weight Loss
Fasting & Weight Loss Coach
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
LeanFast makes intermittent fasting simple, honest, and sustainable. Start a fast in seconds, watch your body move through each metabolic stage, and see real progress — without guilt trips, dark patterns, or 20-question sign-ups.
WHY LEANFAST
• Start fasting in one tap — or log a fast you already started earlier
• A clean fasting ring that turns green the moment you hit your goal
• Backed by peer-reviewed research — every fasting stage cites its source
• A daily Fasting Score that nudges you kindly, never grades you
• Forgiving streaks: a rest day won't wipe out your progress
KNOW EXACTLY WHERE YOU ARE
• Live fasting stages — Fed, Fat Burn, Ketosis, Autophagy — explained in plain language
• An "Eating Window" card that tells you exactly when you can eat next
• A goal-aware "Will this break my fast?" guide for coffee, cream, stevia and more
BUILT-IN SUPPORT
• Popular plans — 16:8, 18:6, 20:4, OMAD, and more
• Optional cycle- and menopause-aware guidance for women
• Optional companion tips for people fasting while on GLP-1 medications
• Hydration reminders, weight tracking, and mood/energy check-ins
STAY MOTIVATED
• Celebrate every completed fast with a shareable win card
• See progress in plain terms — "down 3 lbs since you started"
• Milestones and gentle reminders that keep you going
FREE TO USE — HONEST BY DESIGN
The fasting timer, stages, history, and core tracking are free. No ads. No hidden data collection. LeanFast Pro is an optional subscription that unlocks the smart AI coach, advanced analytics, weight predictions, and progress photos. Prices and renewal dates are shown up front — cancel anytime.
Pro is offered as Weekly, Monthly, or Yearly. Payment is charged to your Apple ID at confirmation. Subscriptions auto-renew unless canceled at least 24 hours before the end of the period; manage or cancel in your Apple ID settings.
Terms: https://vertexlabsolutions.com/leanfast/terms-of-service.html
Privacy: https://vertexlabsolutions.com/leanfast/privacy-policy.html
LeanFast provides general wellness and educational information only and is not medical advice. Consult your doctor before starting any fasting program, especially if you are pregnant, nursing, have a medical condition, an eating disorder, or take medication.
Ratings & Reviews
• LeanFast now runs on iPhones with iOS 17 or later — previously it required a much newer version, so many iPhones couldn't install it at all.
• Live Activity & Dynamic Island: see your fast counting down on the Lock Screen without opening the app.
• The month calendar now shows how long you fasted each day, and tapping a day shows the exact start and end times. Shorter fasts are shown too, instead of disappearing.
• Weights and heights can now be entered in kg and cm.
• Onboarding is shorter, has Back and Skip, and your first fast starts right away. Body stats are optional.
• Fixes: a skipped starting weight no longer records a 0 lb entry that flattened your weight chart; ending a fast no longer cancels your other reminders; the paywall always shows live prices from the App Store.
The developer, Md HASAN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Md HASAN
- Size
- 2.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- LeanFast Pro Monthly $9.99
- LeanFast Pro $4.99
- LeanFast Pro $49.99
- Copyright
- © 2026 VertexLab Solutions