App and iMessage

Your body changes. Your plan should too.

Know how much to eat, without the guesswork. Zolt learns your metabolism and adapts your calorie and macro targets as your body changes.

Get the appGoogle PlayText Zolt

Free to start. Same log in the app and in Messages.

TodayMon 31 Aug
14
72
Zolt
68
Sleep
81
Activity
66
Recovery
Edit
Recovery 66, below your 14-day average of 74
Eaten1,160
990calories left
Target2,150
Protein92/165
Carbs118/215
Fat36/70
Today
Customize
Steps
14-day avg 7,900
8,412
Active burn
14-day avg 470 kcal
512
Exercise
Push day · avg HR 118
46m
Hydration
Goal 3.0 L
1.8 L
Sleep
Score 68 · 52 min below need
6h 42m
Add food
Home
Coach
Goals
Log
You

Your metabolism isn’t a formula

Calorie calculators give you a starting guess. Zolt learns from what you actually eat and how your weight trends to estimate how much energy your body uses.

2,640

cal / day

Week 16 · +190 vs the calculator

2,450What the calculator said in January, and would still be saying
Started runningTwo weeks awaySick weekWeek 1Week 16
Measured burnCalculator estimate, 2,450Markers are your own journal entries

A calorie target that keeps up

Cutting, bulking, or maintaining, Zolt moves your calories and macros as your progress changes. It shows you the change and asks before it applies it.

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

Sunday check-in

Cut · week 7

Daily calorie target

Was 2,100now 2,150+50 cal

What changed

  • Your burn went up

    Measured 2,450 a day, up from 2,400. Steps averaged 9,400, up from 7,900.

    +50

  • Pace is on plan

    Trend 179.1, down 0.6 lb. The 300 calorie deficit holds.

    No change

  • Enough data to trust

    6 of 7 days logged and 7 weigh-ins.

    No change

Protein

165g

Carbs

203215g

Fat

70g

ASK, was sick tue through thu

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

Less logging. More living.

Track food with a photo, a search, a barcode, or a quick text. However it comes in, it lands in the same log with the same numbers.

  • Photo
  • Search
  • Barcode
  • Restaurant menus
  • Text message
  • Usual oats

    Usual oats

    420 cal

  • Chipotle chicken bowl

    Chipotle chicken bowl

    785 cal

  • Levain cookie

    Levain cookie

    620 cal

  • Scoop of whey

    Scoop of whey

    120 cal

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.

66 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 →

A coach in your messages. Your whole body in the app.

Your coach. One text away.

Ask questions, log meals, and get guidance in iMessage. No extra app to open.

  • chipotle chicken bowl, double rice, no cheese785 cal · 52g P · 96g C · 21g F
  • why is the scale up this week?Saturday's salty dinner, mostly water. Your trend is 179.1 and still down 0.6, so the plan holds.
  • [sends a photo of dinner]Salmon, rice, broccoli. Around 610.
  • switch me to maintenance2,450 from today.
  • remind me to weigh in at 8amEvery morning at 8. I'll be insufferable about it.

Six voices

  • Pro
  • Hype
  • Bestie
  • Roast
  • Villain
  • Philosopher

Group chats

Add Zolt to a thread with friends. Everyone opts in, logs to their own account, and shares only what the group asks for.

See the bigger picture.

Sleep, activity, and recovery, connected to your nutrition and progress.

6:40●●● ᯤ ▰
‹Change recovery dateⓘ

Recovery

62Fair

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 ›

Understand your progress.

Your weight trend, not the daily noise, so you know what is working.

Bodyweight

TREND WEIGHT
-0.6 lb/wk
179.1lb

7-day average

Scale Weight:178.4• Today
TueSep 1
Scale
178.4lb
Trend
179.1lb
MonAug 31
Scale
180.2lb
Trend
179.3lb
SunAug 30
Scale
179.0lb
Trend
179.5lb
SatAug 29
Scale
181.1lb
Trend
179.6lb
FriAug 28
Scale
178.6lb
Trend
179.7lb
  • Apple Health
  • Health Connect
  • Apple Watch
  • Widgets
  • Daily Zolt Score

Came here from a calculator or an article?Build a restaurant meal →See how adaptive TDEE works →What Zolt does →

Try everything free for 7 days

One plan with every feature. Cancel from the App Store or Google Play before the trial ends and you pay nothing.

Zolt Pro

$39.99a year

$3.33 a month, billed yearly

  • Adaptive TDEE and a weekly check-in on your target
  • Calorie and macro targets for a cut, bulk, or maintenance
  • Photo, barcode, search, and restaurant menu logging
  • The coach in the app and in iMessage
  • Sleep, recovery, and activity from Apple Health or Health Connect
Get the appGoogle Play

Know how much to eat

Log your next meal in the app or text it to Zolt. It starts learning your metabolism from the first weigh-in.

Get the appGoogle PlayText Zolt