Comparison

MacroFactor vs Aja

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

Head to head
About

MacroFactor

This nutrition app personalizes calorie and macro targets using adaptive algorithms and behavioral science. It offers advanced food logging, detailed breakdowns, and weight trend analysis to help users achieve sustainable diet goals.

Highlights
  • Adaptive nutrition coach
  • Best-in-class expenditure estimate (TDEE)
  • Fastest macro tracker
  • Verified food database
  • Weight Trend visualization
  • Flexible plan modes
  • AI photo food logging
Features
Read full description

MacroFactor is a macro tracker, calorie counter, and nutrition coach app that helps you reach your diet goals to lose weight, gain muscle, or maintain with empowering, sustainable results, by combining innovative coaching algorithms with proven nutrition and behavioral science. KEY CAPABILITIES • Adaptive nutrition coach: smart algorithms personalize your calorie and macro intake targets, just like a nutrition coach would, and weekly check-ins keep you on track • Best-in-class expenditure estimate (TDEE): calculates how many calories you actually burn from your own logs and weight data, so your plan fits your body instead of a generic formula • Fastest macro tracker on the market: log food by AI photo, meal description, speech-to-text, barcode scanner, or nutrition label scanner, so logging takes seconds • Verified food database: more than 1.36 million entries, so you can trust the calorie and macro information of the food you log • Food and meal tracker: covers macros and micronutrients with detailed breakdowns for every meal and day, so you see exactly what you eat • Weight Trend: cuts through the noise of daily weight fluctuations, so you see your real progress • Flexible plans: choose Coached, Collaborative, or Manual mode with balanced, low-carb, keto, or carb-focused diets and different macros on different days, so your plan fits your health and fitness goal • Extra tools in one app: period tracker, habit tracker, data insights and visualization, integrations, and dark mode. HOW IT WORKS 1. Set your goal (lose, maintain, or gain) and choose your rate of weight change to set your calorie deficit or surplus. 2. Log your meals in the food log and weigh in with the weight tracker as usual. 3. Each week, MacroFactor compares your calorie and macro intake with your weight trend to calculate your true energy expenditure (TDEE) and detect changes in your metabolism. 4. It then adjusts your calorie, protein, and macro targets for the week ahead, so your diet plan keeps working and you avoid a plateau. FAQ • How does MacroFactor set my calorie target? It estimates your energy expenditure from your food logs and weight trend, then adjusts your targets at each weekly check-in. • What if I go over my targets or skip logging? Nothing breaks. The algorithm is adherence neutral, so your check-in and calorie adjustment still work, with no warnings or red numbers. • Can I set my own macros instead of following the coach? Yes. Choose Manual mode, and set different macros for different days. • How can I log food quickly? Snap a photo with AI food logging, describe your meal, speak it, or scan a barcode or nutrition label. NOTICES Contains information from Open Food Facts, which is made available here under the Open Database License (ODbL). Open Food Facts: https://openfoodfacts.org/ ODbL: https://opendatacommons.org/licenses/odbl/1-0/ SUBSCRIPTION PRICING & TERMS MacroFactor is a premium macro tracker app that offers three auto-renewing subscription options: $11.99 / month $47.99 / half year $71.99 / year (equal to $5.99 a month) MacroFactor has a free trial, but does not offer a free subscription tier. These prices are for US customers. Pricing in other countries may vary. Payment will be charged to your Apple account at confirmation of purchase. Your subscription to MacroFactor will automatically renew, unless you cancel at least 24 hours before the current period ends. You can cancel or manage your subscription from your Apple account settings. Terms & Conditions: https://terms.macrofactorapp.com/ Privacy Policy: https://privacy.macrofactorapp.com/ MacroFactor is a macro counter, calorie tracker, and AI food tracker with a nutrition coach that adapts your calorie and macro targets every week, helping you lose weight, maintain, or build muscle without stress.

About

Aja

This gamified nutrition tracker helps you log meals, hit macro goals, and build healthy habits. Earn rewards by completing quests and watch your virtual garden grow as you make progress. Features AI-powered meal scanning and science-backed nutritional adjustments.

Highlights
  • Gamified nutrition tracking
  • AI meal scanning
  • Customizable macro targets
  • Virtual garden rewards
  • Barcode and label scanning
  • Dynamic calorie adjustments
Read full description

Track food, hit your macros, and build healthy habits with Aja. This gamified nutrition tracker makes eating better feel fun and rewarding. Whether you're trying to lose weight, build muscle, or just stay consistent, Aja makes it easy. ◆ GROW YOUR GARDEN ◆ Log meals, hit your macros, and complete Quests to earn Stars and discover new plants. Watch your garden blossom and thrive as you stick to healthy habits. ◆ EFFORTLESS MEAL LOGGING ◆ Aja’s AI Image Scanner can accurately analyze the nutrition content of any meal in seconds. The meal entry page allows lightning fast addition, deletion, and edits of any ingredient (you can even add components to a meal by simply scanning a barcode or nutrition label!) ◆ SCIENCE BACKED NUTRITION ◆ No more guessing games. Aja will dynamically adjust your calorie and macronutrient targets over time, based on your body’s metabolism. ◆ YOUR JOURNEY, OUR MISSION ◆ Aja wants to empower you to be the best version of yourself. We are constantly improving the app, and promise to always stay true to our mission of helping people make sustainable, healthy nutrition choices. Join AJ, your space-faring robot guide, on a mission to restore the galaxy’s flora one healthy habit at a time. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

MacroFactor4 screens
Aja4 screens

Verdict

The call

MacroFactor and Aja both sit at 4.8 stars, but that hides the real split: 100% of Aja's written reviews are positive against 71% of MacroFactor's. MacroFactor's advantage is ratings volume (24K vs 26) and update cadence (every 9 days vs every 5 weeks). On price, rating, ads and in-app purchases 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. MacroFactor sells 10 in-app purchases, starting at $9.99 per month and Aja sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Aja holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: MacroFactor has 24K ratings behind it against 26, so its average is the more settled of the two. Written reviews point the same way: 71% of MacroFactor's written reviews are positive against 100% of Aja's.

UpkeepUpdate frequency

MacroFactor ships an update every 9 days, Aja every 5 weeks. The most recent releases landed on November 8, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 6 level
MacroFactor versus Aja: the parameters behind the verdict, then further details
ParameterMacroFactorAja
PriceFreeFree
Rating4.8 (24K ratings)5.0 (26 ratings) — better
Positive reviews70.6% of reviews100.0% of reviews — better
Number of ratings24K — better26
Update frequencyEvery 9 days — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
Best chart rank#12 — better—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size247 MB51 MB
Age rating9+17+
DeveloperStronger By Science Technologies LLCAja Nutrition LLC

Customer experience

MacroFactor

All ratings23,836 ratings
Positive96.2%
Neutral1.3%
Negative2.5%
Written reviews1,594 reviews
Positive70.6%
Neutral9.5%
Negative19.9%

Aja

All ratings26 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

MacroFactor

Reported bugs

2 issues
  • Disappearing food entries
  • Inconsistent syncing with Apple Health

Requested features

5 requests
  • Apple Watch integration
  • Micronutrient tracking
  • Ability to edit database entries
  • Improved barcode scanning for international users
  • Customizable dashboard and widgets

Aja

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

MacroFactor

Subscriptions10
  • Monthly Subscription14 Days trial$9.991 Month
  • Monthly Subscription7 Days trial$11.991 Month
  • Monthly Subscription$11.991 Month
Show 7 more
  • Monthly Subscription14 Days trial$11.991 Month
  • Semiannual Subscription7 Days trial$47.996 Months
  • Semiannual Subscription14 Days trial$47.996 Months
  • Annual Subscription14 Days trial$59.991 Year
  • Annual Subscription7 Days trial$71.991 Year
  • Annual Subscription14 Days trial$71.991 Year
  • Annual Subscription Bundle$89.991 Year
2 purchases

Aja

Subscriptions2
  • Aja Club7 Days trial$9.991 Month
  • Aja Club$49.991 Year

Questions

Is MacroFactor free?
MacroFactor is free to download, with in-app purchases available.
Is Aja free?
Aja is free to download, with in-app purchases available.
Which has better reviews, MacroFactor or Aja?
Aja is rated higher. MacroFactor averages 4.8 out of 5 from 24K ratings, while Aja averages 5.0 from 26 ratings.
Do MacroFactor or Aja have ads?
Neither MacroFactor nor Aja shows ads.
Which is updated more often, MacroFactor or Aja?
MacroFactor ships an update every 9 days, and Aja every 5 weeks. Most recently, MacroFactor was updated on November 8, 2026 and Aja on November 4, 2026.

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