Natural-language logging
Describe a meal the way you'd text it. Joul splits it into foods with sensible portions.
Know what you burn.
Know what you eat.
Joul connects to WHOOP, logs your food in seconds, and shows whether today is a deficit or a surplus. No clutter. No database to wrestle.
iPhone · Works with WHOOP · Free to start
Burned.
Eaten.
Balanced.
Your calories burned, pulled in automatically.
WHOOP already knows how much energy you spend. Joul reads it, so you only log what you eat. The result is one clear number for the day, and a calendar that shows the pattern.
Today's
Tuesday, 20 October
Today so farProvisional
−420 kcal
↓ Estimated deficit
EatenWHOOP burned
2,080 kcal2,500 kcal
Protein94 / 140 g
Breakfast409 kcal
🥚Eggs, 2 pieces155
🍞Toast, 2 slices159
🍎Apple, 1 piece95
CancelAdd Food
TypePhoto
2 eggs, toast and an apple
🥚
Eggs2 pieces · 100 g
155 kcal🍞
Toast2 slices · 60 g
159 kcal🍎
Apple1 piece · 182 g
95 kcalTap any item to adjust its portion.
409 kcal · 19 g proteinSave
Your, this month
, this monthOctober 2026‹ ›
Weekly balance−2,350 kcal
Set up in a minute.
Log in seconds.
- 1
Connect WHOOP
Sign in on WHOOP's own page. Joul never sees your password.
- 2
Pick your goal
Lose fat, maintain, or gain muscle. We suggest gentle defaults you can change.
- 3
Say what you ate
Type “2 eggs, toast and an apple”. Foods, emoji and portions appear, ready to tweak.
- 4
See your Joul
One number for the day, plus a calendar and weekly view of where you stand.
Everything you need.
Nothing you don't.
Emoji for every food
A curated food-to-emoji set makes your diary readable at a glance. Change any of them.
Photo logging Premium
Snap a meal and review the estimated portions. Nothing is saved until you say so.
Calories burned, automatically
Pulled from WHOOP, shown as today so far, then as a complete day once the cycle ends.
A calendar that tells the story
Deficit, surplus or incomplete at a glance. Days you haven't confirmed are never counted as a deficit.
Protein, front and centre
A simple progress bar toward your target, with carbs and fat when you want them.
Honest about the maths.
WHOOP measures physiological cycles, not midnight to midnight, so Joul labels today as provisional and marks every balance as an estimate. We never assume zero calories burned, and we never treat an empty diary as a perfect day. Joul is not medical advice.
Free to start.
Premium when you want more.
Free
$0
- Connect WHOOP and see calories burned
- Daily estimated balance
- Manual logging with emoji and editable portions
- Protein tracking
- 7 days of history and charts
- 3 saved meals
- 3 photo analyses to try
Joul Premium
$4.99 / month
or $29.99 / year
- Everything in Free
- Photo logging, with fair use
- Unlimited history and analytics
- Unlimited saved meals
- Advanced charts and macro targets
- Nutrition and WHOOP insights, as they launch
Prices shown are planned launch prices and may change.
Be first in line.
Joul is coming to iPhone. Tell us you're interested and we'll write when it's ready.
Join the waitlistQuestions
Do I need a WHOOP?
Yes. Joul's calories-burned number comes from WHOOP, so a WHOOP membership and the WHOOP app are required for the core experience.
Is Joul on Android?
Not at the moment. Joul is being built for iPhone first.
How accurate are the numbers?
They're estimates. WHOOP's energy expenditure is an estimate, and so are portion sizes and nutrition values. Joul shows the balance as an estimate, labels provisional days, and lets you edit everything.
Is this medical advice?
No. Joul is a tracking tool. Talk to a qualified professional about your health, diet and goals.
What happens to my data?
You connect WHOOP through WHOOP's own sign-in. You can disconnect at any time and delete your data from inside the app. Full details will be in our privacy policy before launch.
Is Joul affiliated with WHOOP?
No. Joul is an independent app that works with WHOOP data you choose to share. It isn't endorsed by or affiliated with WHOOP.