LeanFast-Fasting & Weight Loss
Fasting & Weight Loss Coach
About
This app is a smart intermittent fasting companion that simplifies and guides users through various fasting plans. It offers a timer, AI-powered coaching, weight tracking with predictions, and detailed analytics to help users achieve their health goals.
What's New in LeanFast
1.2
May 3, 2026
Big redesign — fasting that finally feels intuitive. • New Home dashboard: streak, weekly progress at a glance, quick actions for water, weight & food • Smarter Timer with 5 evidence-backed fasting zones (Patterson & Sears, Anton et al., NEJM) • AI Coach now answers your questions privately, on-device • Weight Predictions powered by your own trend (Pro) • Cleaner Plan picker with 10 plans for every goal • Milestones & streaks with citations to peer-reviewed research • Apple Health integration improvements Thanks for fasting with us!
MoreSubscription plans
LeanFast Pro
AI coaching, analytics & unlimited plans.
Developer apps
FAQ
What is LeanFast?
LeanFast is a smart intermittent fasting companion designed to make fasting simple, effective, and sustainable. It offers a timer, AI coaching, weight tracking, and analytics to guide users through their fasting journey.
What fasting plans does LeanFast support?
LeanFast supports a variety of customizable fasting plans, including 16:8, 18:6, 20:4, OMAD (One Meal A Day), and 5:2, among others.
Does LeanFast offer personalized guidance?
Yes, LeanFast features AI-powered coaching that provides personalized fasting tips based on your progress and offers smart meal suggestions for your eating windows.
Can LeanFast help with weight management?
LeanFast includes weight tracking with trends over time and AI-powered weight predictions to show users where they are headed, along with BMI tracking and goal setting.
Is LeanFast free to use?
All core features of LeanFast are completely free, making it an accessible tool for users looking to start or maintain their intermittent fasting routine.
Does LeanFast require an account?
No, LeanFast does not require an account, and your data stays on your device, offering enhanced privacy for users.
What health milestones can LeanFast track?
LeanFast helps users track fasting milestones such as fat burn, ketosis, and autophagy, celebrating achievements with shareable cards and providing research-informed insights into what is happening in the body.
Does LeanFast have ads?
LeanFast is ad-free, allowing users to focus on their fasting journey without interruptions.