Lessa — Your GLP-1 Guide, by Your Side
One app for the whole journey on semaglutide, tirzepatide or liraglutide: log every dose and where you injected it, watch your estimated medication level, and keep protein, water and calories where they need to be. A tracking app, not a doctor — Lessa never recommends a dose.
Built Around the Week of a GLP-1 Shot
Appetite drops after a dose, protein slips, and muscle goes with the weight. Lessa is designed around that rhythm: it knows when your Quiet Time is, what your protein floor is, and when the next shot is due.
Dose Log With Site Rotation
Log the dose, the medication and the injection site on a body map. Lessa marks where you injected last, suggests the next site for rotation, counts down to the next dose and reminds you gently — repeating if you have not logged it.
Estimated Medication Level
A curve of your estimated medication level over the past four weeks and the week ahead, built from your own logged doses and each drug's published half-life. Labelled as an estimate, never as a blood test.
Log a Meal From a Photo
Describe a meal by typing or by voice, snap a photo or a nutrition label, or scan a barcode. Lessa estimates calories, protein, carbs, fat and fibre, and you review every item before it is saved.
Side Effects, Weight and Mood
Log nausea, fatigue, food noise and other side effects with a severity, weigh in with a progress photo, and note how the day went. Progress shows weight, BMI, calories, water and mood week by week.
Protein Floor and Quiet Time
Your plan sets a daily protein floor to protect muscle while you lose weight. On the days after a shot, when appetite is lowest, Lessa flags Quiet Time and nudges you towards a protein-rich snack instead of a skipped meal.
Steps From Apple Health or Health Connect
Connect your phone's health data to see the calories you burned, or add an activity from an A–Z list with intensity and duration. Health data is read on the device and never leaves it.
A Doctor-Ready Report
Export a PDF of your doses, weight trend, side effects and nutrition averages for your next appointment, or a CSV of everything you logged. Made for the conversation with your prescriber, not a replacement for it.
Your Data Stays on This Phone
No account, no cloud. Doses, weights, meals and photos are stored only on your device. AI logging sends just the meal you describe, after you agree once; your profile and medication never go with it.
See Lessa in Action
Dose, Track and Progress — a closer look at the screens you will open every day.
From First Dose to a Habit in 3 Steps
- 1
Set Up Your Plan
Pick your medication and schedule, tell Lessa your goal and how you eat, and get a plan with daily calorie, protein and water targets — plus your Quiet Time days.
- 2
Log the Dose
Record each shot with its date, dose and injection site. Lessa schedules the next reminder, starts the countdown and updates your estimated medication level.
- 3
Track the Days Between
Log meals, water, weight, activity, mood and side effects in a tap or two. Watch the trends in Progress, and take the report to your next appointment.
Which medications does Lessa support?
Approved GLP-1 and GIP/GLP-1 medications — semaglutide, tirzepatide, liraglutide and dulaglutide brands — and their compounded versions, with daily, weekly, every-two-weeks or custom schedules. You can also add another medication you take by name with its own schedule.
Does Lessa tell me what dose to take?
No, never. Lessa is a tracking app, not a doctor. Dose options exist only so you can log what your prescriber told you to take; the app never suggests a dose, a titration step or a change to your treatment.
What is the medication level chart?
An estimate of how much medication is in your system, calculated from the doses you logged and each drug's published half-life. It is shown as a percentage of peak, not a concentration, and it is a model — not a measurement of you.
Is my health data private?
Yes. Everything you log stays on your phone; there is no account and no cloud library. If you connect Apple Health or Health Connect, Lessa reads steps and active energy on the device only. Analytics never receive medication names, doses, weights or photos.
How does AI meal logging work?
You describe a meal, record it by voice, or take a photo of the food or its label. That text, recording or photo is sent to Google Gemini to estimate calories and nutrients — after you agree once — and you review and edit the result before saving. Your profile and medication are never sent with it.
What is free and what is PRO?
Dose logging, injection sites, reminders, the countdown, water, weight, mood, side effects and manual meals are free. PRO adds AI meal and activity logging beyond the first three, the full medication level curve, health sync, unlimited progress photos with before/after compare, full history and the doctor report.
Make the Weeks Between Shots Count
Download Lessa on iPhone or Android and keep your doses, protein and progress in one calm place.
