Comparison

Interval Weight Loss vs Macro Sync

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Interval Weight Loss

This scientifically developed program offers a structured approach to sustainable weight loss by resetting metabolism and building healthy habits. It provides flexible meal plans, educational resources, progress tracking tools, and optional access to a personal dietitian.

Highlights
  • Habit tracker for balanced eating, exercise, and sleep
  • Flexible and adaptable meal plans with new recipes
  • Educational videos and articles on weight loss science
  • Tools to track weight, blood changes, and measurements
  • 24/7 access to a personal dietitian (PLUS plan)
  • Stepped approach to weight loss without starvation mode
Features
Read full description

Interval Weight Loss is a scientifically developed health and weight loss program that's proven to deliver lasting results. It is currently ranked the number 1 program globally for sustainable weight loss. Developed and tested by Dr Nick Fuller from the University of Sydney, IWL takes a stepped approach to weight loss that's sustainable, resets your metabolism, and allows your body to return to a healthy weight without going into starvation mode. Unlike other programs, we’re not sexy, but we are proven - and we’re easy for everyone to follow. Download and start your weight loss journey today. FEATURES Transform yourself building healthy habits: Use our habit tracker to consistently build and maintain habits from IWL’s core principles. Integrate daily routines like balanced eating, regular exercise, and good sleep patterns for lasting health transformations. Flexible meal plans for your lifestyle: Gain access to an extensive collection of adaptable recipes that will help you enjoy a varied diet without feeling restricted. New recipes are regularly added to cater to diverse tastes and nutritional needs. Empower yourself with knowledge: Dive into videos and articles to understand the science behind IWL’s weight loss and wellness strategies, equipping you with the knowledge to make informed health decisions for lasting change. Tools to track your success: Monitor your journey and celebrate your milestones in weight loss, blood changes, waist measurements and more. See the tangible results of your long-term efforts. Your personal dietitian, just a message away: Benefit from 24/7 access to a personal IWL dietitian with the PLUS plan, offering customised dietary guidance to align your nutritional choices with your personal health goals, tailored to your unique journey with IWL. View terms here: Privacy policy: https://intervalweightloss.com/privacy-policy Terms of use: https://intervalweightloss.com/terms-and-conditions Billing Terms: https://intervalweightloss.com/billing-terms

About

Macro Sync

This app simplifies health and fitness by making nutrition tracking easy. Log meals, organize recipes, and monitor calories and macronutrients with proven recommendations. It offers a user-friendly interface with powerful tools for personalized diet management.

Highlights
  • Macro tracking
  • Micro tracking
  • Custom goals
  • Barcode scanner
  • Recipe creator
  • Verified food database
  • Community support
Features
Read full description

Macros Sync simplifies your health and fitness goals without sacrificing the foods you love in a simple, easy way. Macro Sync is your free, user-friendly food-tracking app that centralizes everything you need. Quickly log meals, organize recipes, and see your calories in one place. Designed to streamline your nutrition journey, Macro Sync makes managing your diet effortless and effective. Achieve your goals and enjoy a healthier, happier you with Macro Sync. PROVEN RECOMMENDATIONS Macros Sync creates estimated calorie and macronutrient targets that help you reach your health and fitness goals. Our estimating equations have been used and tested in more than 4 million people and helped hundreds of thousands of individuals reach their goals. We know that your goals change so we have made Macro Sync to fit your changing life. You can change your goals and our technology immediately updates to provide you an updated plan any time, anywhere. SIMPLE, EFFECTIVE TRACKING TOOLS We designed Macro Sync from the ground up based on feedback from hundreds of thousands of individual people. Macro Sync has taken all of the powerful tools you want as a user (custom food entry, searchable database, recipe builder, barcode scanner, etc.) and made them incredibly simple and easy to use. Our tracker takes all of the premium/paid features of other trackers and provides them to you at no cost, including: Macro Tracking Micro Tracking Custom Goals Personalized Food Database Barcode Scanner Recipe Creator Custom meals Ad Free Experience Net Carbs Mode Community Support REAL FOOD DATA We’ve spent decades working with people on tracking food and we know what foods people actually eat. This is the foundation with which we built our food database, which undergoes constant updating. We know that the landscape of food tracking can be daunting, especially when you don’t know what data to trust. This is why we have included verified foods in our database that you can quickly and visibly confirm are verified. Our food database includes: Calories Macronutrients Micronutrients Toggleable net fiber Auto Calorie Calculators Confirmed Serving Sizes Popular Food Brands Barcodes COMMUNITY SUPPORT Macro Sync not only allows you to track your food but also welcomes you to join an already established community of over 500,000 people cultivated by Macros Inc, the developers of Macro Sync. In this free community you will have access to professional coaches who answer questions, provide feedback, and provide immense amounts of free education.

Screenshots

Interval Weight Loss4 screens
Macro Sync4 screens

Verdict

The call

The clearest difference is in-app purchases: Macro Sync at none against Interval Weight Loss's 11. Macro Sync also leads on update cadence (every 4 days vs fortnightly). On price, review sentiment, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Interval Weight Loss sells 11 in-app purchases, starting at $14.00 per month. Macro Sync asks for nothing beyond the download.

UpkeepUpdate frequency

Interval Weight Loss ships an update fortnightly, Macro Sync every 4 days. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

Scorecard3 real differences · 7 level
Interval Weight Loss versus Macro Sync: the parameters behind the verdict, then further details
ParameterInterval Weight LossMacro Sync
PriceFreeFree
Rating—4.5 (602 ratings) — better
Positive reviews60.0% of reviews — better57.6% of reviews
Number of ratings—602 — better
Update frequencyFortnightlyEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better16
Further details — not scored
Size119 MB124 MB
Age rating4+12+
DeveloperInterval Weight LossMacros Inc

Customer experience

Interval Weight Loss

Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

Macro Sync

All ratings602 ratings
Positive88.0%
Neutral6.0%
Negative6.0%
Written reviews85 reviews
Positive57.6%
Neutral16.5%
Negative25.9%

Bugs and requests

Interval Weight Loss

Not enough reviews yet to summarise bugs or requests.

Macro Sync

Reported bugs

3 issues
  • Crashes when adding new foods
  • Inability to access previous day's entries
  • Inconsistent nutrition data measurements

Requested features

5 requests
  • Ability to edit custom food entries
  • More advanced nutrition tracking options
  • Personalized daily macro goals
  • Improved barcode scanning reliability
  • Expanded food database

In-app purchases

11 purchases

Interval Weight Loss

Subscriptions11
  • IWL Plan Monthly$14.001 Month
  • IWL Plus Monthly$29.001 Month
  • IWL Essential$40.001 Month
Show 8 more
  • IWL Plan Quarterly$59.003 Months
  • IWL Plan Quarterly (Trial)1 Month trial$59.003 Months
  • IWL Plus Quarterly$129.993 Months
  • IWL Plus Quarterly (Trial)1 Month trial$129.993 Months
  • IWL Plan Yearly$179.001 Year
  • IWL Plan Yearly (Trial)1 Month trial$179.001 Year
  • IWL Plus Yearly$399.001 Year
  • IWL Plus Yearly (Trial)1 Month trial$399.001 Year
None

Macro Sync

No in-app purchases

Questions

Is Interval Weight Loss free?
Interval Weight Loss is free to download, with in-app purchases available.
Is Macro Sync free?
Macro Sync is free to download, with no in-app purchases.
Do Interval Weight Loss or Macro Sync have ads?
Neither Interval Weight Loss nor Macro Sync shows ads.
Which is updated more often, Interval Weight Loss or Macro Sync?
Interval Weight Loss ships an update fortnightly, and Macro Sync every 4 days. Most recently, Interval Weight Loss was updated on September 21, 2026 and Macro Sync on September 23, 2026.

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