Leptin

Graylin AI

In-app purchases

About this app

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 real metabolic phases. Watch your body move from fed and anabolic, into fat-burning, toward ketosis — clear phases, not a plain countdown.
EAT - smart break-fast and meal guidance, so progress isn't undone in the first bite.
MOVE - movement tuned to your fasting state, working with your metabolism, not against it.
COACH - an AI coach that adapts to your fasting state, goals, and history.
INSIGHTS - streaks, history, and progress that build consistency over time.

IMPORTANT HEALTH INFORMATION

Leptin provides general wellness and educational information only. It is not a medical device and does not provide medical advice, diagnosis, or treatment. The in-app AI coach is an assistant, not a clinician.

Always consult a qualified healthcare professional before starting a fast, beginning an exercise programme, or changing your diet or medication — especially if you are pregnant or breastfeeding, under 18, or living with a condition such as diabetes, an eating disorder, low blood pressure, or heart disease.

Stop and seek medical attention if you feel faint, disoriented, unusually short of breath, or experience chest pain.

What’s new

Tea and Coffee are now in the intake list. Stopping a reminder alarm opens "Did you take it?" instead of just opening the app. Daily messages no longer sit unread once their day has passed. The coach's history scrolls and loads older conversations, and the send countdown has one button. Workouts done elsewhere can be logged as self-reported, and stopping one early keeps your progress so you can pick it up where you left off.