Deficit: Calorie Counter
Calorie Deficit Tracker
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Most weight loss apps make you guess. Deficit doesn't.
Snapping photos of your plate won't tell you how much to eat. Deficit calculates the exact calorie deficit you need to hit your goal weight—based on your stats, your activity, and real biometric data from your wearables. Then it tracks every meal and calorie burned against it.
It's not a diet. It's the number you need to hit, and the tools to hit it.
HOW DEFICIT WORKS
1. Take the 60-second onboarding quiz. We ask about your weight, your goal, your activity level, and a few other inputs.
2. Get your daily calorie target. Built on real metabolic science—TDEE, BMR, and activity multipliers—not a generic 1,200 calorie guess.
3. Log meals, sync your wearables, and hit the number. Deficit auto-adjusts as your weight changes, so your target always matches your goal.
WHAT MAKES DEFICIT DIFFERENT
- Real math, not photo gimmicks. We calculate your deficit using validated metabolic formulas.
- Adjusts as you progress. Drop 10 lbs and your target updates automatically.
- Built on data you already have. Pulls calories burned, heart rate, and recovery from your wearables instead of asking you to guess.
- Designed to be measurable. Every day either hits the deficit or doesn't. No vague streaks, no fake progress.
FEATURES
- Personalized daily calorie target
- Full macro tracking (protein, carbs, fat)
- Fast meal logging
- Weight trend and progress charts
- Daily streak tracking to keep you consistent
- Two-way Apple Health sync
- Goal weight and timeline projections
INTEGRATIONS
- Whoop — pulls strain, recovery, and calories burned
- Apple Watch — workouts and heart rate
- Apple Health — weight, activity, and nutrition data both directions
WHO IT'S FOR
People who want to lose weight with a system, not a vibe. Whether you're cutting 10 lbs for an event or 50 lbs for the long haul, Deficit gives you the number to hit and the tools to hit it.
If you've tried calorie apps that felt like a chore, or photo apps that felt like a guess, this is the version that actually works.
MEDICAL DISCLAIMER
The information provided by this application is for informational and educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified physician or other licensed healthcare provider regarding any medical condition or treatment.
Do not disregard professional medical advice or delay seeking it because of information obtained through this application. If you believe you are experiencing a medical emergency, contact your local emergency services or healthcare provider immediately.
By using this application, you acknowledge that any health-related information or recommendations provided are not a replacement for consultation with a qualified healthcare professional.
Thank you for using Deficit. We regularly release updates to enhance performance, introduce new features, and ensure a smoother, more reliable experience.
The developer, DeficitTracker, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Deficit App LLC
- Size
- 34.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © @Deficit LLC 2026