Lose weight

Gain muscle

Maintain results

With the science-based diet coach and macro tracker that adapts to your metabolism

Start your 7-day free trial

Download on the App Store or Google Play to start your free trial of this premium, ad-free app. After your trial, plans start at $5.99 USD per month. 

food logger

Verified food database and fastest food logging workflows

macro planner

Personalized recommendations and macro programs designed by experts

nutrition coach

Weekly adjustments adapt to your metabolism and keep you on track

Reach your diet goals with the smartest macro tracker and nutrition coach

MacroFactor uses a dynamic algorithm to adapt to changes in your metabolism and personalize your macro plan to keep you on track.

"The best paid diet app"

"MacroFactor provides exactly the functions I used to have to cobble together from three different apps."

Create a custom macro program

  • Let us design a plan for you, set and adjust your own macros, or choose to take full control with Coached, Collaborative, and Manual program styles
  • Customize your macros based on diet preferences: Low-carb, keto, carb-focused, or balanced between fat and carbs
  • Set different calories and macros on training and non-training days
  • Set fasting days

Set goals and get dynamic weekly adjustments

  • Set goals to bulk, maintain, or cut weight
  • Set target weight and rate at which you’d like to gain or lose
  • Get dynamic weekly adjustments to your plan based on actual logged caloric intake, weight change, and our energy expenditure calculation

Easily track your food with our ultra-fast logger and verified database

  • Barcode scanner
  • Copy/paste foods, meals, and entire days
  • Custom foods and recipes that are easy to create and edit
  • Smart history that remembers what you eat and when
  • “AI describe” that allows you to log via your voice or plain text
  • Metric and imperial options

Track both macronutrients and micronutrients

  • Your custom macro plan includes protein, fat, and carbohydrate targets
  • Track micronutrients (vitamins and minerals)
  • Track alcohol, caffeine, water, leucine, fiber, omega-3s and 6s, cholesterol, choline, and much more.

User-focused design

  • Unique insights and data visualization for weight trends, energy expenditure, and habits
  • Data privacy and protection
  • Export your data any time
  • Light and dark modes
  • Period tracking
  • Integrations with FitBit, Google Fit, and Apple Health that enable connections with tons of health apps

Start your 7-day free trial

Download on the App Store or Google Play to start your free trial of this premium, ad-free app. After your trial, plans start at $5.99 USD per month. 

What makes MacroFactor different?

MacroFactor uses a unique energy expenditure calculation and all of the weight and nutrition information you log to personalize your calorie intake targets, much like a nutrition coach would.

You probably are familiar with CICO: Calories in – Calories out = Change in stored energy. If you eat fewer calories than you expend, you will lose weight. If you eat more calories than you expend, you will gain weight.

Other food loggers help you quantify “calories out” by tracking your caloric intake.

  • But: They use rough, static formulas or expenditure estimates from wearables to inform your calorie targets.
  • What that means for you: Using an outdated or unreliable expenditure estimate means you can’t solve the CICO equation. The estimate doesn’t accurately account for changes in your energy needs from lifestyle, activity, and weight or nutrition shifts. You don’t know how much to eat to reach your goals, the scale stops moving, and you hit frustrating plateaus.

MacroFactor is the only food logger on the market to use a dynamic algorithm that dials in your “calories out” much more accurately.

  • How? The app continually updates and refines your personalized expenditure estimate based on your nutrition data and your rate of weight gain or loss.
  • What that means for you: Using a best-in-class expenditure estimate, MacroFactor can adapt to changes in your metabolism so you never plateau.

The bottom line: MacroFactor keeps pace with your ever-changing energy needs and updates your expenditure estimate as needed to ensure that your calorie targets are appropriate for your goals.

An empowering and sustainable approach to nutrition tracking

Our philosophy

With MacroFactor, you don’t have to eat like a robot, and you’ll never be shamed for the choices you make.

MacroFactor’s ​​calculations and adjustments are based on what you actually did, not what you were “supposed” to do. Unlike other diet coach apps, you don’t have to perfectly adhere to your daily or weekly targets to get evidence-based adjustments to your macro plan.

Because of this adherence-neutral approach, you’ll never see warnings, red numbers, or shaming when you go over your calorie or macro targets, unlike in other macro tracker apps.

Instead, MacroFactor aims to empower you with the guidance and tools you need to reach your goals without stress, shaming, or unnecessary rigidity.

How does MacroFactor stack up?

MacroFactor was built by two sports nutrition and physiology experts and two machine learning and software experts. The result is an app that’s smarter than any other.



MyFitnessPal (Premium)

Carbon Diet Coach

RP Diet

Food log to keep track of what you eat and drink

Large verified food database

Custom designed macro program based on your preferences and goals

Dynamic weekly adjustments to your plan based on actual logged caloric intake and weight change

Barcode scanner

Powerful clipboard-based utility for copying and pasting foods, meals, and entire days

Full micronutrient reporting

Custom foods and recipes

Timeline-style food log that doesn’t limit you to a discrete number of meals or snacks

Smart history that remembers what you eat and when

“AI describe” that allows you to log via your voice or plain text

Sophisticated weight trending

Dynamic and science-driven expenditure calculation

Customizable actions menu and robust dashboard analytics for energy expenditure trend, weight trend, logging habits, and more.

Convenient integrations and ability to “bring your own food logger”

Price comparison


Monthly: $11.99
Yearly: $71.99


Monthly: $19.99
Yearly: $79.99


Monthly: $9.99
Yearly: $79.99

RP Diet

Monthly: $19.99
Yearly: $99.99


What people are saying about MacroFactor

AndreaMacroFactor user
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"It has been such a gamechanger for making everything about macro tracking much more straightforward. It has taken the stress off of trying to hit my macros perfectly for the sake of the weekly average and allowed me to feel able to live my life while still working towards my goals! I no longer feel discouraged or off track because the app takes all of my information into account, instead of only whether I hit my macros perfectly or not. I can not recommend MacroFactor enough!"
RackhamMacroFactor user
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"With other nutrition apps, I had to do so much of the work myself – estimating my caloric needs, adjusting targets through trial and error, readjusting as my weight and activity levels changed, setting custom macro goals… MacroFactor’s automated coaching eliminates the guesswork and keeps me on the right track. Better results and less work – what’s not to like?"
HelenaMacroFactor user
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"MacroFactor was truly designed with a goal-driven person in mind. Aside from its database of foods and the simple, time-based food logger, it also gives you feedback on your tracking habits, a trend-based view of your true body weight, and an estimation of your daily caloric expenditure – all of which update dynamically based on your inputs, and all of which I found extremely helpful as I continued my weight cutting journey. I felt armed with information and sensible guidance as I used MacroFactor, and it helped keep me organized with all of my nutrition-related data in one place. I very much recommend it to fitness enthusiasts who are serious about making progress!"
NateMacroFactor user
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"The app is far better than any nutrition tracker I have used in the past. From the timeline based (not traditional meal based) food log, to the fast and comprehensive barcode scanner, to the trend weight tracker, to the energy expenditure calculations that get more accurate the more you use the app, MacroFactor is truly something special. I compete in powerlifting and am really excited to keep using this app to guide my nutrition through each phase of training."
JustinMacroFactor user
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"I’ve been using MacroFactor for a month now and I’ve never felt less neurotic about my nutrition or scale numbers. In general, I try to make out a weekday meal plan for myself and simply eat mindfully over the weekend. While I would prefer to not track nutrition (one less thing to worry about), the level of precision I feel that I get with MacroFactor is empowering. I’m currently doing a lean bulk and despite the sharp peaks and valleys that the scale has shown, MacroFactor’s weight trend function puts my mind at ease letting me know that I’m making the steady progress I’m hoping for."
JonathanFounder of Personal Trainer Development Center (
MacroFactor user
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"Tracking food is a pain. The huge number of variables makes it complicated but somehow MacroFactor has found a way to make the onboarding and use obvious and intuitive. This is super impressive."
CraigMacroFactor user
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"I’ve used just about every major diet tracking app, and MacroFactor is by far the most intelligent and robust tool of its kind. The dynamic weekly adjustments is like having my own personal nutrition coach in my pocket. It totally took the guess work out of trying to figure out how I needed to modify my diet to meet my goals."
LexiMacroFactor user
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"MacroFactor plays into two of my favorite things: data and goals. The app is formula driven and allows you to rely on its intelligence with the coaching route or manually set up your plan. While it monitors and displays daily numbers (weight, calories, expenditure), it emphasizes trends and an accumulation of data points on the map. Macronutrient breakdowns are easy to view within each meal or over a period of time, with each target prominently displayed on the dashboard and food log to show you where you stand throughout the day. Not to mention the app is visually pleasing and intuitive to use – hello, color schemes, sleek graphs and shortcuts! As a sports dietetics student, I can confidently say this app will be a staple for me both personally and professionally."

How MacroFactor works

You don’t have to eat like a robot and perfectly adhere to your targets to get a dynamic, science-backed nutrition plan that’s perfectly calibrated for you and your goals.

Step 1

Answer a few questions

Tell us about your lifestyle, goals, food preferences, and training demands.

Step 2

Get your program

MacroFactor will recommend custom calorie and macronutrient targets for you based on your goals and the latest science.

Step 3

Log your weight and nutrition

Take a few minutes per day to log your weight and the foods you eat, so MacroFactor can calculate your energy expenditure and caloric needs with even greater precision.

Step 4

MacroFactor's smart algorithms make dynamic changes to your macro plan

MacroFactor makes adjustments to your calorie and macro recommendations each week based on how your body is responding, regardless of how close you came to hitting your calorie targets.

Start your 7-day free trial

Download on the App Store or Google Play to start your free trial of this premium, ad-free app. 

Subscription plans for after your free trial

Month to month

Your account will be charged on a monthly basis.
$ 11


Your account will be charged yearly for $71.99.
$ 5

Every 6 months

Your account will be charged every 6 months for $47.99
$ 7

Frequently asked questions

MacroFactor’s database covers most staple foods (fruits, vegetables, meats, grains, dairy products) and has excellent barcode support in the US, Canada, the UK, Australia, Ireland,  New Zealand, and most of Western Europe (including France, Spain, Germany, and Italy).

Countries outside of those may see fewer localized options, but users can still log from the huge library of common foods, and add custom foods and recipes for local foods. We are also taking steps to improve branded product and barcode support for everyone. 

No, there won’t be a free version – for a few reasons. MacroFactor will be ad-free and focused on making the user experience as seamless and user-friendly as possible. Stronger By Science also partnered with the app developers (instead of just hiring them as contractors and then sending them on their way once we launch). That means the app will be continually improving and updated all the time, but it also means the app needs to make money to make it worth all the time and effort from the developers.

MacroFactor’s prices are set at a competitive rate, though, and you have the option to choose from three subscription options to find the one that works best for you.

We do also offer a free trial, so you can try it out before being charged.

Currently, we don’t pull data from smart watches or activity trackers for one simple reason: they don’t seem to do a particularly good job of estimating energy expenditure.

Instead, we look at trended weight changes and compare those changes to calorie intake in order to back-calculate energy expenditure. We have some ideas about how we may be able to use activity data to further tweak and fine-tune our energy expenditure estimations at the margins, so we do plan on allowing users to integrate with activity trackers eventually (so we can empirically test those ideas). But for now, data from activity trackers wouldn’t affect the core functionality of the app: weight and nutrition data give us all the information we need to generate and adjust macro programs.

MacroFactor’s prices are set at a competitive rate, though, and you have the option to choose from three subscription options to find the one that works best for you.

We do also offer a free trial, so you can try it out before being charged.

Not right now, but that’s something we’re planning on adding in the future.

Yes! Through our integrations with Apple Health, Google Fit, and Fitbit, MacroFactor supports historical import of the last 30 days of data. This is more than enough to kickstart our analytics, and give you highly optimized recommendations on day one.

We don’t currently have a built-in coaching portal to allow you to see and manage your clients’ nutrition programs in-app. However, we make it easy for users to take screenshots of their nutrition information for the past week, and more importantly, we make it easy for users to export their daily weight, calorie intake, and macronutrient intake data to a spreadsheet, which they could send to a coach. MacroFactor also allows users to set custom macro targets day-to-day, which will make it simple for your clients to adjust their daily targets to match your recommendations. MacroFactor also supplies information that other apps don’t, including sophisticated weight trending and updating estimations of daily energy expenditure, which might help you make better diet adjustments for your clients. In short, we’re not going to pretend that MacroFactor is a game changer for nutrition coaches, but, relative to other nutrition apps, it should reduce a bit of friction to make your life (and your clients’ lives) a little easier.

Your estimated energy expenditure is a deterministic calculation based on your calorie intake and changes in body weight.

We start with the basic energy balance equation: Calories in – Calories out = Change in stored energy (and changes in stored energy obviously come with changes in weight over time). Since we want to estimate your energy expenditure, we need to rearrange the equation to solve for “Calories out”: Calories in – Change in stored energy = Calories out.

“Calories in” is simple to calculate, since you’re either logging your food in MacroFactor, or importing nutrition information from another source that’s synced with this app. “Change in stored energy” is slightly tougher to estimate, since we’re ultimately working with weight data. However, we can use information about your rate of weight change and the caloric content of fat tissue versus lean tissue to estimate the change in stored energy associated with your changes in weight (fat has a greater energy density than lean mass; at slower rates of weight loss or faster rates of weight gain, we anticipate that a larger proportion of the weight you gained or lost came from fat mass). From there, it’s simply a matter of solving the equation.

For example, if we estimate that you’ve been in an energy surplus of 200 Calories per day based on the rate at which your weight has been changing, and we can see that you’ve been eating approximately 3000 Calories per day, we can calculate that your daily energy expenditure is approximately 3000 – 200 = 2800 Calories.

As you continue to use MacroFactor, we’ll continue monitoring your energy intake and changes in weight to update your calculated energy expenditure. If you gain or lose a substantial amount of weight, or if your activity levels change, we won’t have to guess how those changes will impact your daily energy expenditure; we’ll be able to measure the impact, and adjust your calorie and macro recommendations accordingly.

Since our calculation of your energy expenditure is based solely on tracked energy intake and changes in weight, that allows our calorie and macro adjustments and recommendations to be “adherence-neutral.” In other words, you don’t have to be a robot with perfect dietary adherence for MacroFactor to make appropriate updates to your calorie and macro recommendations, based on your goals. If you eat a little more or a little less one week than your macro program recommended, that’s totally fine! Your updated calorie and macro recommendations for the next week are based on your actual energy intake and changes in weight, not how well you stuck to our recommendations. Not only does this allow our systems to be more robust to deviations from your macro program (which are totally fine; we don’t expect people to be robots), but we also hope that this “adherence-neutral” system will make deviations from your macro program less psychologically stressful. Since our system doesn’t require or expect perfect dietary adherence to make appropriate updates to your calorie and macro targets, that should lessen the perceived psychological cost of occasionally deviating from your recommended calorie targets.

As one final note, this calculation of energy expenditure is really at the heart of MacroFactor, and a lot of work has gone into ensuring that it’s as accurate and reliable as possible, given what we know about human physiology and metabolism. We’ve also taken great care to make it as robust as possible to less-than-perfect tracking (the more consistently you track your weight and nutrition, the better our recommendations will be, but if you occasionally forget to log your weight or nutrition, our algorithms still do an admirable job of rolling with the punches). However, it has one Achilles heel: partial nutrition tracking. If, for example, you track your breakfast and lunch one day, but you don’t put your dinner in the Food Log, we have no way of knowing that your energy intake for the day is incorrect, and your estimated daily energy expenditure (and future calorie recommendations) will decrease accordingly. However, as long as you avoid partial nutrition tracking, we should be able to accurately and reliably estimate your energy expenditure, and therefore recommend and appropriately adjust calorie and macro targets for you based on your goals.

"The top nutrition tracking app on the market"

"MacroFactor is the top nutrition tracking app on the market to date because of its RD verified food database, its convenient food logging input, its attention to detail, and its intuitive algorithms that work with the user instead of against them."


Reach your diet goals with MacroFactor

Join 90,000 users and confidently control your nutrition with MacroFactor. Download and start your free trial to get your custom macro plan and food logging access today.