Leptin brings when you eat, what you eat and how you move into one plan for the day, and adjusts it when life gets in the way.
It is not a calorie counter. There are no targets to miss and no warnings attached to a meal, because the point is the pattern over weeks, not a number at dinner.
And it is not only for people managing a diagnosis. This is simply how eating and movement work, for everyone.
Together these shape your metabolic health, which is the thing underneath weight, energy and how you feel through the day.
FAST - a timer built around metabolic phases rather than a plain countdown,
with a Live Activity so your progress stays on the lock screen.
EAT - break-fast and meal guidance, meal logging with photos, and a nutrition
database, so progress isn't undone in the first bite.
MOVE - guided workouts with an audible coach that calls out each phase and
keeps going while your phone is locked, interval walking sessions, freestyle
logging, and movement suggestions tuned to how long you have been fasting.
COACH - an AI coach that adapts to your fasting state, goals, and history.
INSIGHTS - streaks, history, and progress over time, plus Apple Health sync so
your workouts and activity stay in step with the rest of your health data.
Leptin works offline: sessions and logs are captured on the device and sync
when you are back online.
Leptin is a wellness and lifestyle app. It is not a medical device and does
not diagnose, treat, cure, or prevent any disease, and it does not provide
medical advice. The in-app AI coach is an assistant, not a clinician, and its
guidance should never be relied on for medical decisions. Consult a qualified
healthcare professional before starting any fasting, nutrition, or exercise
program, especially if you are pregnant or breastfeeding, under 18, or living
with a medical condition such as diabetes, heart disease, low blood pressure,
or a history of disordered eating. Stop and seek medical attention if you feel
faint, disoriented, unusually short of breath, experience chest pain, or feel
unwell in any way.
Core fasting tracking, timers, and insights are free.
SUBSCRIPTIONS
Leptin offers optional auto-renewable subscriptions (subscription group
"Leptin Plans") that unlock the AI coach with a monthly credit allowance plus
expanded access to guided programs:
- Basic: $9.99/month or $99.99/year
- Premium: $19.99/month or $199.99/year
- Unlimited: $49.99/month or $499.99/year
Payment is charged to your Apple ID at confirmation of purchase. Your
subscription automatically renews unless auto-renew is turned off at least 24
hours before the end of the current period. Your account is charged for
renewal within 24 hours prior to the end of the current period. You can manage
or turn off auto-renew in your App Store account settings after purchase.
Terms of Use (EULA): https://leptin.app/terms
Privacy Policy: https://leptin.app/privacy
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
The meal card now leads with what you actually ate rather than a counter, and once you have logged a meal it opens on the page that lets you log the next one — Scan a menu, Check a meal and Log meal are where you left them.
Home has a bar across the top: Fast, Eat, Move, Coach, Insights. It follows along as you scroll so you can see which part of your day you are looking at, and tapping one shows just that part of Home. Tap it again to bring everything back.
New at the top of Home: Now — the one thing worth doing next, with a button to get on with it.
Opening the app is a great deal faster, and Home arrives in one piece instead of assembling itself in front of you.
Version 1.2.16
The developer, GRAYLIN AI (PTY) LTD, 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 Linked to You
The following data may be collected and linked to your identity:
Health & Fitness
Purchases
Contact Info
User Content
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
GRAYLIN AI (PTY) LTD
Size
58.5 MB
Category
Health & Fitness
Compatibility
Requires iOS 15.1 or later.
iPhone Requires iOS 15.1 or later.
iPod touch Requires iOS 15.1 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.