Scan your food.
Protect your muscle.
Snap a photo of your plate and Leucy tells you the calories, the protein and whether you are on track to lose fat, not muscle. Plus shot reminders, side-effect insights and your weight trend in one calm app.
Works with Zepbound®, Wegovy®, Mounjaro®, Ozempic®, the Wegovy® pill, Foundayo™ and more. For tracking and education only, never dosing advice.
How it works
Three seconds a meal. A clear answer every time.
GLP-1 medications quiet your appetite, which makes it easy to eat too little protein. Leucy makes the one number that matters easy to hit.
Snap your plate
Take a photo, scan a barcode or type what you ate. A vision model estimates each food and the portion, and you can adjust it with a slider.
Get your protein verdict
See calories, protein, carbs, fat and fiber, plus a one-line answer on whether today's protein is on track for your goal.
Stay steady around your dose
Shot and pill reminders, an injection-site map and side-effect logs come together to show what tends to happen on your shot days.
A look inside
Calm screens. Clear numbers.
Real screens from the Leucy app. Every one is built around protein, your dose and how you feel.
Swipe to see more screens
Everything in one place
Built for life on a GLP-1, not a generic calorie counter.
Every screen is designed around smaller appetites, shot days and keeping your muscle while the scale moves.
Photo meal scan
Point, shoot and log. Barcode and text entry are there when a photo is not, and portion sizes are tuned for small GLP-1 plates.
Protein-first dashboard
A daily protein ring, calories, fiber and water, with 20 small, high-protein ideas for days when nothing sounds good.
Shot and pill scheduler
Countdown to your next dose, one-tap logging and a body map that reminds you to rotate injection sites.
Estimated medication level
An educational curve of how medication may rise and fade between doses, drawn from published half-lives and clearly labeled as an estimate.
Side effects, in context
Log 20 common side effects on a 0 to 10 scale. After three weeks Leucy shows patterns, such as nausea peaking the day after your shot.
Weight and milestones
A 7-day average that smooths daily noise, a goal line, 5, 10 and 15 percent milestones and a Sunday summary.
Food coach for queasy days
Ask what to eat when you feel off. The coach talks about food, fluids and fiber only, and always sends dosing questions to your prescriber.
Restaurant menu scan
Photograph a menu and get the three dishes with the most protein for the least volume.
Health, widgets and reports
Apple Health sync, home and lock screen widgets, and a PDF report of doses, weight and side effects to bring to your appointments.
Why protein first
Lose the fat. Keep the muscle.
When appetite drops, meals get small and protein is often the first thing to go. Getting enough protein and staying active are widely recommended ways to help protect lean muscle while you lose weight.
- A daily protein target built from your body and your goal, which you can change any time.
- A 2 pm nudge if you are behind, with low-volume foods that fit a small appetite.
- Maintenance mode for when you taper or stop, so protein stays first as your plan changes.
Your provider can tell you the right protein target for you.
Progress you can trust
See the trend, not the day.
Scales bounce around. Leucy draws a 7-day average so you can see real progress, and celebrates 5, 10 and 15 percent milestones along the way.
- Goal line and percent of the way there.
- Weight and steps from Apple Health, if you connect it.
- A PDF report of doses, weight and side effects for your next appointment.
Works with your medication
Weekly shots, daily pills and everything in between.
Leucy only records the doses you enter and never suggests a dose. Brand names belong to their owners and appear only to show compatibility. Leucy is not affiliated with Novo Nordisk or Eli Lilly.
Private by design
Your health data stays on your phone.
Leucy stores what you log in a database on your device. You do not need an account, and nothing is sold, shared for advertising or used to build ad profiles.
- Meals, doses, side effects and weights live on your device unless you turn on backup.
- Meal photos are sent only to estimate the food and are not stored on our servers.
- Apple Health data never leaves your device and is never used for advertising.
- Export or delete everything from the app whenever you like.
Pricing
Try Leucy Pro free for 3 days.
One subscription unlocks everything. Cancel any time in your Apple ID settings.
Weekly
per week
Yearly
per year, about $4.99 a month
3-day free trial
Monthly
per month
Prices are in US dollars and may vary by country; the App Store shows your local price before you buy. The free trial applies to the yearly plan and converts to a paid subscription unless you cancel at least 24 hours before it ends. Subscriptions renew automatically until cancelled. See Subscriptions and refunds.
Questions
Good to know
Does Leucy tell me what dose to take?
No. Leucy never recommends, changes or questions a dose. It records the doses you enter and shows them back to you. Questions about dosing, missed doses or switching medication belong with your prescriber.
How accurate is the photo scan?
It is an estimate. A vision model identifies the foods and portion sizes and shows a confidence score. You can adjust the portion, edit any item, or use a barcode or text entry instead. For packaged foods, a barcode is usually the most accurate.
Is the medication-level curve my real blood level?
No. It is an educational estimate based on published half-lives and the doses you log, shown in relative units. It is not a measurement and should never guide dosing.
Do I need an account?
No. Leucy works without an account. If you want backup across devices, you can opt in to Sign in with Apple and cloud sync from Profile.
Which devices are supported?
Leucy is built for iPhone. Apple Health sync and home and lock screen widgets are included.
How do I cancel?
On your iPhone, open Settings, tap your name, then Subscriptions, then Leucy, and tap Cancel Subscription. You keep Pro until the end of the period you paid for.
Make every small meal count.
Scan your food, hit your protein and see your progress, with your data kept on your phone.
Coming soon to iPhone