Interval Weight Loss vs Macro Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- Macro tracking
- Micro tracking
- Custom goals
- Barcode scanner
- Recipe creator
- Verified food database
- Community support
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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
Verdict
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
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.
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.
| Parameter | Interval Weight Loss | Macro Sync |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (602 ratings) — better |
| Positive reviews | 60.0% of reviews — better | 57.6% of reviews |
| Number of ratings | — | 602 — better |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 16 |
| Further details — not scored | ||
| Size | 119 MB | 124 MB |
| Age rating | 4+ | 12+ |
| Developer | Interval Weight Loss | Macros Inc |
Customer experience
Interval Weight Loss
Macro Sync
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
Interval Weight Loss
- IWL Plan Monthly$14.001 Month
- IWL Plus Monthly$29.001 Month
- IWL Essential$40.001 Month
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- 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
Macro Sync
No in-app purchases
Questions
Is Interval Weight Loss free?
Is Macro Sync free?
Do Interval Weight Loss or Macro Sync have ads?
Which is updated more often, Interval Weight Loss or Macro Sync?
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