Available on iMessage
The calorie target that keeps up with you
Zolt learns your real metabolism from your food logs and weigh-ins, then adjusts as your training, travel, and life change. Text it to log.
Free to start. Works in Messages. The app is optional.
Zolt Coach ›
Today 9:41 AM
Everything else, you just text it
Thirteen things the app does, all from the same thread. No menus.
- Food785 cal · 52g P · 96g C · 21g F
- PhotosSalmon, rice, broccoli. Around 610.
- BodyweightTrend's 179.1, down 0.6.
- Goals2,450 from today.
- MeasurementsDown an inch since March with weight flat.
- WorkoutsThat's 20 lbs up since January.
- InjuriesPulling the running days. Same knee as February?
- Water96oz. You're ahead of yesterday.
- JournalYou run about 300 over on bad-sleep days.
- RecipesSaved. Just text "usual oats" next time.
- Custom foods40g in 240. Saved.
- EditsGone. Back to 1,350.
- RemindersEvery morning at 8. I'll be insufferable about it.
Came here from a calculator or an article?Build a restaurant meal →See how adaptive TDEE works →What Zolt does →
It moves when your life does
A calculator gives you one number in January and never revisits it. Zolt solves for your burn rate every day from what you ate and what the scale did.
2,640
cal / day
Week 16 · +190 vs the calculator
A calculator gives you one number in January.Zolt gives you a new one every Sunday.
It notices. You say why.
Zolt won’t pretend to know that you were ill or travelling. It shows you the change and asks.
A proposed target every Sunday. You approve it, keep last week’s, or talk it through.
Sunday check-in
Cut · week 7
- Trend weight
- 179.1 lb−0.6 this week
- Pace
- 0.6 lb / wkOn plan
- Adherence
- 6 of 7 daysLogged
New target
2,150cal
165g
Protein
215g
Carbs
70g
Fat
That explains the dip. Holding you at 2,100 this week rather than cutting further.
It can be six different people
Text PERSONALITY to switch. The numbers never change. The delivery entirely does.
Dry, direct, knows the science cold
620. That's a quarter of your day, delivered by cookie. → day 1,520/2,180 cal
Same 620 calories. Same 660 left. Same 37g of protein still on the board.
Everything you text is already in the app
Same log, same number, whichever one you open. The app is where the rest of the picture lives: sleep, recovery, trends, and the reasoning behind today’s target.
Zolt Coach ›
Today 9:41 AM
Remaining today
235cal
Protein
105 / 165g
Carbs
219 / 215g
Fat
69 / 70g
Today’s meals
Target updated this morning
Held at 2,180 after your sick week. Reassessing Sunday.
And the two scores that decide tomorrow
Both are read from Apple Health or Health Connect overnight. Sleep sets recovery, recovery sets whether the coach tells you to push or hold, and neither needs you to log anything.
- Trend weight
- Energy & TDEE
- Widgets
- Apple Watch
- Apple Health
- Health Connect
- Barcode scanning
- Photo logging
- Daily Zolt Score
- 6:40●●● ᯤ ▰‹ⓘ
Time asleep
6h 52m
91%
Efficiency
11:48p
Bedtime
7:20a
Wake
Stages
Breakdown
Deep1h 06m16%REM1h 28m21%Core4h 18m63%Awake40mApple Watch · Updated 7:22 am · How sleep stages are detected ›
Sleep
Stages, HRV, and resting heart rate, scored against your own baseline
- 6:40●●● ᯤ ▰‹ⓘ
Recovery
48 ms
HRV
58 bpm
Resting HR
6h 52m
Sleep
What moved it
Sleep duration−7←Resting HR−5←HRV−4←Prior-day load−2←Apple Watch · Updated 7:22 am · How recovery is scored ›
Recovery
Whether today is a push day or a back-off day, before you get to the gym
Put your coach in the group chat
The fastest accountability system ever built is four friends who can see each other’s numbers. Zolt runs the scoreboard.
- Add it to a thread you already have
- Zolt introduces itself once, then stays quiet until someone talks to it. It is a group member, not a bot that posts all day.
- Nobody appears without opting in
- Members reply JOIN before their numbers show up in a leaderboard. Everyone keeps their own account, targets, and history.
- Everyone logs in the same place
- Each person’s food goes to their own log. The group only ever sees what the group asked for.
Cutting Season ›
Today 6:12 PM
Dev
Asha
It already knows the menu
Panda Express, In-N-Out, Chipotle, Chick-fil-A. Real menus with the restaurant’s own build rules, so a bowl you customised counts correctly instead of landing as a rough guess.
- Panda ExpressNutrition calculator →
- In-N-OutNutrition calculator →
- ChipotleNutrition calculator →
- Chick-fil-ANutrition calculator →
- CavaNutrition calculator →
- SubwayNutrition calculator →
- WingstopNutrition calculator →
- Olive GardenNutrition calculator →
- 50 Lan
- 7 Leaves Cafe
- 7th Street Burger
- Bareburger
- Blank Street Coffee
- Blue Bottle Coffee
- Boba Guys
- Burger King
- Chatime
- CHI CHA SAN CHEN
- CoCo Fresh Tea & Juice
- Dave's Hot Chicken
- Ding Tea
- Domino's Pizza
- Dos Toros Taqueria
- Dunkin'
- Dutch Bros
- Feng Cha
- Gong cha
- Happy Lemon
- HEYTEA
- IHOP
- It's Boba Time
- Kung Fu Tea
- Levain Bakery
- Los Tacos No.1
- Möge Tee
- Naya
- Popeyes
- Quickly
- Raising Cane's
- Sharetea
- Sunright Tea Studio
- Sweetgreen
- T4
- Taco Bell
- Taqueria Ramirez
- Tastea
- Teaspoon
- The Halal Guys
- Tiger Sugar
- TP Tea
- ViVi Bubble Tea
- Waffle House
- Whataburger
- Win Son Bakery
- Xi'an Famous Foods
- Xing Fu Tang
- YiFang Taiwan Fruit Tea
Including the ones nobody else bothered with
Tea houses are modelled down to the sweetness level and the topping. Try texting it a HEYTEA order and watch it come back with a real number.
57 menus, and hundreds more items every week. The same menus power the calculators on this site, the search in the app, and the coach in your messages, so a number never changes depending on where you looked it up.
Browse every calculator →Send it what you ate
No account to create first, no onboarding flow to finish. Text the number and it starts working out your metabolism from there.