Simple and fast nutrition tracker that knows you.

Log a meal by voice or photo in seconds. Deficit sets your targets from your lean mass and re-tunes them every week, whether you're cutting or holding.

Install via TestFlight

As fast (or as precise) as you want.

Some days you want exact grams. Some days you just want it logged. Deficit does both.

Convenience

Listening…

Just say it

Detailed recipe with measurements? Triple cheeseburger and fries? Logged anyway.

Snap your plate

Photo it; Deficit reads the ingredients and portions.

Your usual, instantly

Recent and favourite food: always 1 tap away.

Any language

Tired of chicken breast? Deficit will find any food.

Precision

3M+

foods in the catalog

A verified database

Real, checked foods and serving sizes.

Save recipes

Build your meal once; log the whole bowl in a tap.

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Barcode / label scan

Scan the barcode or nutrition label when it must be exact.

Exact servings

Pick the exact serving: grams, slices, or cups.

Any app can count calories.

Deficit turns the count into a plan that moves with you.

01

Your starting number is personal.

The scale shows one number. Your body fat says what it's made of. Deficit builds your calories and protein on your lean mass, so two people at the same weight start on different plans.

Leaner 82 kg · 15% fat
2,300 kcal 153 g protein
Higher body fat 82 kg · 30% fat
2,000 kcal 126 g protein

Same scale weight. Different plan.

02

Then your body takes over.

A single weigh-in can swing a kilo overnight: water, sodium, a salty dinner. Deficit reads the trend underneath, weighted to your last ten days, so it follows where you're actually heading, not last night's noise.

+0.6 kg of water, not fat
Daily weigh-ins Trend Daily weigh-ins jump around. The trend doesn't.
03

And the trend is a measurement.

Lose nearly a kilo and you've measured something real: about a thousand calories a day below what you burned. No formula guesses that. Your body reported it. Each week Deficit compares what it expected to what actually happened, and moves your target to match.

−0.9 kg trend this week
≈ 1,000 kcal/day below what you burned 7,700 kcal ≈ 1 kg of fat
Expected −0.5 kg, you went deeper + calories next week, to protect muscle

Deficit only adjusts when there's enough data to trust it, and never deeper than your training can recover from.

See the science
  • Deficit Week Results — Week 3 of 8, trend weight, calories, on track

    Track your progress weekly. Guided diet cycles that re-adjust to your lifestyle.

  • Deficit cycle setup — calorie target, length, target weight, pace, projected end

    A plan with an end date. Short cycles with one weekly check-in, and a finish line instead of an endless grind.

  • Deficit weekly adjustment — calorie target re-tuned from the week

    Targets that move with your life. Each week your numbers adjust to how the last one actually went.

  • Deficit activity — steps, workouts and the calories you actually burned

    Hard workout? Your watch over-counts anyway. Deficit credits the calories you actually earned.

  • Deficit reminders for weigh-ins and measurements

    Reminders that keep you consistent. Nudges for weigh-ins and body-fat checks, daily and weekly.

  • Deficit syncing steps and workouts from Apple Health Works with Apple Health

    Works with Apple Health. Steps and workouts sync automatically.

One plan. The whole app.

Every feature from day one. Cancel anytime.

  • Weekly
    $2.99 /week
     
  • 3 months
    $19.99 /3 mo
     
  • Best value Yearly
    $49.99 /year
    about $4.17 a month

Same complete app on every plan.

Install via TestFlight

7-day free trial, cancel anytime.