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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.

Start texting ZoltGet the app

Free to start. Works in Messages. The app is optional.

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Zolt Coach ›

Today 9:41 AM

panda express orange chicken with fried rice
Logged. 900 cal · 29g P · 103g C · 42g F.
and a levain chocolate chip walnut
620 more. That puts you at 1,520 before dinner.
You have 660 left and 37g of protein on the day. Dinner is going to have to carry.
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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. The industry calls this adaptive TDEE. Most apps only claim it.

Started runningTwo weeks awaySick weekWeek 1Week 16
Measured burnCalculator estimate, 2,450Markers are your own journal entries

It notices. You say why.

Zolt won’t pretend to know that you were ill or travelling. It shows you the change and asks.

Weekly

A proposed target every Sunday. You approve it, keep last week’s, or talk it through.

Daily

Or let it recalculate every morning and just send you the recap. No reply needed.

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

+50

165g

Protein

215g

Carbs

70g

Fat

YES

Apply it

KEEP

Roll over

ASK

Talk it through

ASK — was sick tue through thu

That explains the dip. Holding you at 2,100 this week rather than cutting further.

Where the whole picture lives

Texting is the fastest way in. The app is where it all adds up: scores, trends, sleep, recovery, and the reasoning behind today’s number.

  • Daily Zolt Score
  • Widgets
  • Apple Watch
  • Apple Health
  • Health Connect
  • Barcode scanning
  • Photo logging
Get the app
The Zolt home screen showing today's scores and calorie target
  • The burn rate, broken into where it came from

    Energy & TDEE

    The burn rate, broken into where it came from

  • Signal pulled out of daily scale noise

    Trend weight

    Signal pulled out of daily scale noise

  • Everything you texted, plus everything you scanned

    Food log

    Everything you texted, plus everything you scanned

  • Stages, HRV, and resting heart rate, scored

    Sleep

    Stages, HRV, and resting heart rate, scored

  • Whether today is a push day or a back-off day

    Recovery

    Whether today is a push day or a back-off day

Everything else you can just text it

Thirteen things the app does, all reachable from the same thread.

  • Food

    chipotle chicken bowl, double rice, no cheese

    785 cal · 52g P · 96g C · 21g F

  • Photos

    [sends a photo of dinner]

    Salmon, rice, broccoli. Call it 610.

  • Bodyweight

    weighed in at 178.4

    Trend 179.1, down 0.6. On pace.

  • Weight goals

    switch me to maintenance

    Target moves to 2,450.

  • Measurements

    waist 32.5 this morning

    Down an inch since March, weight held.

  • Workouts

    legs, 5x5 squats at 225

    Third leg session this week.

  • Injuries

    left knee is acting up again

    Second flare this month. Dropping the running days.

  • Water

    another 32oz

    96oz today. Ahead of yesterday.

  • Journal

    slept badly, work stress

    You run about 300 over on those days.

  • Recipes

    save this as my usual overnight oats

    Saved. Text "usual oats" next time.

  • Custom foods

    my protein shake is 240 cal, 40g protein

    Saved to your foods.

  • Edits

    delete the boba

    Gone. Back to 1,350 today.

  • Reminders

    remind me to weigh in at 8am

    Every morning at 8.

And it can be six different people

Text PERSONALITY to switch. The numbers never change. The delivery entirely does.

  • Pro

    Dry, direct, knows the science cold

  • Hype

    Every logged meal is a sports broadcast

  • Bestie

    Lowercase, texty, lowkey devastated

  • Roast

    Compliments are rare and clearly painful

  • Villain

    Your cut is a world domination plan

  • Philosopher

    Marcus Aurelius texting from 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.
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Cutting Season ›

Today 6:12 PM

Dev

STATUS
Priyam 1,840 / 2,180 · 142g P Dev 2,010 / 2,400 · 158g P Asha 1,290 / 1,900 · 88g P
Asha you have 610 calories and four hours. Live a little.

Asha

ordering right now
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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.

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.

Hundreds more go in 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.

Start texting ZoltGet the app

(816) 908-1702