Best Weight Loss Calculator Apps

249+ iOS apps curated and reviewed

4.8 avg rating
20 free apps
Updated September 2026

Out of 249+ weight loss calculator apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Weight Loss Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1BMI Calculator – Weight LossBMI Calculator – Weight LossFree4.5★ (28K)NoYesSep 2026
2Calorie Deficit CalculatorCalorie Deficit CalculatorFree4.7★ (3.7K)NoYesSep 2026
3Happy ScaleHappy ScaleFree4.9★ (58K)NoYesSep 2026
4Weight Diary LiteWeight Diary LiteFree4.8★ (7.2K)YesNoSep 2026
5Lose It! – Calorie CounterLose It! – Calorie CounterFree4.8★ (776K)YesYesSep 2026
6Monitor Your WeightMonitor Your WeightFree4.8★ (23K)YesYesSep 2026
7WeightDrop Weight Loss TrackerWeightDrop Weight Loss TrackerFree4.8★ (4K)YesYesSep 2026
8BMI Calculator ~ Weight LossBMI Calculator ~ Weight LossFreeYesNoMay 2026

Top Picks for Weight Loss Calculator

BMI Calculator – Weight Loss#1

BMI Calculator – Weight Loss by Steffen Mayer

Calculate your ideal weight
Editor's Choice
💪 Health & Fitness
4.5😞(28K ratings)
FreeIn-App Purchases
BMI Calculator – Weight Loss screenshot 1
BMI Calculator – Weight Loss screenshot 2
BMI Calculator – Weight Loss screenshot 3

Calculate and track your Body Mass Index (BMI) with this user-friendly app. It provides personalized health insights, ideal weight recommendations, and supports various units and classification systems. Monitor your weight journey and understand health risks.

What We Love

  • 🚀 Easy to use
  • 📊 Helps track progress
  • 💪 Motivates weight loss

Room to Improve

  • 🤕 Can cause insecurity
  • 🚫 Inaccurate BMI calculations
  • 🚨 Promotes unhealthy behaviors
Calorie Deficit Calculator#2

Calorie Deficit Calculator by Starry Web Ltd

Oatsy Macro Tracker Diet Coach
Strong Contender
💪 Health & Fitness
4.7😐(3.7K ratings)
FreeIn-App Purchases
Calorie Deficit Calculator screenshot 1
Calorie Deficit Calculator screenshot 2
Calorie Deficit Calculator screenshot 3
Calorie Deficit Calculator screenshot 4
Calorie Deficit Calculator screenshot 5
Calorie Deficit Calculator screenshot 6

This app helps you achieve your health and nutrition goals by tracking your food intake, water consumption, and exercise. It offers a comprehensive nutrition database, custom diet plans, and AI-powered food scanning to make logging easier.

What We Love

  • 🚀 Simple and easy to use
  • 👍 Helpful for tracking calories and macros
  • 🚀 Efficient barcode scanning
  • 👍 Integrates with Apple Health
  • 🚀 Comprehensive food database
  • 👍 Tracks water intake and exercise

Room to Improve

  • 🐛 Bugs and glitches with the app
  • 🔍 Limited food options, especially for cultural dishes
  • 🔍 Inaccurate macro calculations
  • 🔍 Difficult to add custom portions and recipes
  • 🔍 Overlapping UI elements on newer iPhones
  • 🔒 Too many features locked behind paywall
Happy Scale#3

Happy Scale by Front Pocket Software LLC

Weight Loss Tracker
Worth Considering
💪 Health & Fitness
4.9😊(58K ratings)
FreeIn-App Purchases
Happy Scale screenshot 1
Happy Scale screenshot 2
Happy Scale screenshot 3
Happy Scale screenshot 4
Happy Scale screenshot 5
Happy Scale screenshot 6

This app helps you understand your weight loss journey by analyzing scale fluctuations. It smooths out daily variations to reveal your true progress, predict future weights, and break down goals into manageable milestones.

What We Love

  • 👍 Excellent weight loss support tool
  • 👍 Motivating and engaging to track weight
  • 👍 Provides great insights and predictions
  • 👍 Smooths out weight fluctuations
  • 👍 Breaks down weight loss journey into milestones
  • 👍 Customizable and user-friendly interface
  • 👍 Reliable and consistent app with good customer support
  • 👍 Helps maintain weight loss and prevent regain
  • 👍 Syncs well with Apple Health
  • 👍 Provides a realistic and positive perspective on weight changes

Room to Improve

  • 🐛 Reminders don't work for some users
  • 💰 Subscription model is expensive for some

More Weight Loss Calculator apps to explore

FAQ about Weight Loss Calculator

What are the best weight loss calculator apps for iPhone?
BMI Calculator – Weight Loss tops our weight loss calculator apps ranking as of September 2026, with a 4.5-star average from 28K App Store ratings, and it's free to download.
Yes — 20 of the top weight loss calculator apps we rank are free to download, including BMI Calculator – Weight Loss and Calorie Deficit Calculator.
BMI Calculator – Weight Loss has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ weight loss calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app calculates and tracks your Body Mass Index (BMI) using accurate and user-friendly methods. It offers personalized health insights, ideal weight recommendations, and visual feedback on your BMI categories. You can monitor your weight loss or gain journey and understand potential health risks associated with your BMI.
Key features include instant BMI calculation with an animated visual gauge, personalized health insights, and ideal weight recommendations. It supports metric and imperial units, offers a choice between WHO and DGE classification systems, and includes age and gender-specific calculations. The app also works offline and has a clean, intuitive interface.

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