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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.

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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
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You

Zolt Coach

Sunday 9:00 AM

Sunday check-in. Trend's 179.1, down 0.6, right on pace. I'm updating your target this week: 2,100 → 2,150. Protein stays at 165g. Reply YES to apply it.
YES

Delivered

2,150 it is. Talk Sunday.
iMessage

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

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

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

Zolt Coach

Today 9:41 AM

usual oats
420. Logged. → day 420/2,180 cal
chipotle chicken bowl, double rice, no cheese
785 cal · 52g P · 96g C · 21g F → day 1,205/2,180 cal
and a levain chocolate chip walnut
620. That's a quarter of your day, delivered by cookie. → day 1,825/2,180 cal
scoop of whey

Delivered

120, and 24g of protein. 235 left on the day.
iMessage

Today

Breakfast
420 cals
P20g
C55g
F14g
Fi8g

Overnight Oats

20P  14F  55C • 1 serving

420 cals
Lunch
785 cals
P52g
C96g
F21g
Fi12g

Chipotle Chicken Burrito Bowl

52P  21F  96C • 1 bowl

785 cals
Snacks
740 cals
P33g
C68g
F34g
Fi3g

Levain Chocolate Chip Walnut Cookie

9P  33F  65C • 1 cookie

620 cals

Whey Protein Isolate

24P  1F  3C • 1 scoop

120 cals

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.

63 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
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  • 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 ▰
‹ⓘ

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
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  • 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 before the trial ends and you pay nothing.

Zolt Pro

$34.99a year

$2.92 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
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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 appText Zolt