MacroFactor vs Aja
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MacroFactor
This app uses a dynamic algorithm to adapt your calorie and macro targets based on your metabolism and progress. It offers tools for quick food logging, a verified database, and personalized coaching to help you achieve sustainable diet goals without stress or rigidity.
- Dynamic metabolism adaptation
- Personalized macro and calorie targets
- Verified food database
- Barcode scanner
- Weekly coaching check-ins
- Micronutrient tracking
- Weight trend insights
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MacroFactor combines innovative coaching algorithms with proven nutrition and behavioral science to help you reach your diet goals and achieve empowering, sustainable results. MacroFactor uses a dynamic algorithm to adapt to changes in your metabolism and personalize your macro plan to keep you on track. Download to start your 7-day trial of this premium, ad-free macro tracker app. DIET SMARTER Using a best-in-class expenditure estimate, MacroFactor’s nutrition coach algorithm adapts to changes in your metabolism so you never plateau. • The unique energy expenditure calculation detects changes in your metabolism • Smart algorithms personalize your calorie and macro intake targets, just like a nutrition coach would • Weekly check-ins keep you on track toward your goals The result? You better understand your body’s needs and can successfully reach and sustain your goals without stress. THE BEST MACRO TRACKER TOOLS • The fastest macro tracker on the market with tools like barcode scan and custom foods • Verified food database, so you can trust the accuracy of the foods you log • Custom macro programs and weekly check-ins based on your goals and preferences • Detailed breakdowns of micronutrients, macros, and more • Period tracker, habit tracker, unique data insights and visualization, integrations, dark mode, and more AN EMPOWERING, SUSTAINABLE APPROACH MacroFactor’s robust nutrition coach algorithm will make appropriate adjustments to your calorie and macro targets based on what you log, regardless of how close you came to hitting your targets from the previous week. The algorithms don’t function any worse if you deviate from your macro targets. This means that unlike other nutrition coach apps, you don’t have to eat like a robot or perfectly adhere to your macro targets in order to get your weekly coaching check-in and an appropriate calorie adjustment. 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’s macro tracker and nutrition coach aim to empower you with the guidance and tools you need to reach your goals without stress or rigidity. A CLOSER LOOK AT FEATURES & BENEFITS Nutrition coach • Get a science-backed macro plan designed for your goals and preferences • Set a goal to lose, maintain, or gain weight • Smart nutrition coach AI makes weekly changes to your macro plan to keep you on track Macro tracker • Large verified food database, so you can trust that calorie and macro information is accurate • Barcode scanner • Food tracker for both macros and micronutrients • Features like copy/paste, custom foods, and smart history make food tracking quick and easy • Timeline-style food log doesn’t lock you in to a certain number of meals • Metric and imperial options • Custom foods and recipes Health insights tracker • Best-in-class expenditure estimate • Unique Weight Trend insight that cuts through the noise of daily fluctuations • Habit tracker • Period tracker 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 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/
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.
- Gamified nutrition tracking
- AI meal scanning
- Customizable macro targets
- Virtual garden rewards
- Barcode and label scanning
- Dynamic calorie adjustments
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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
Verdict
The clearest difference is review sentiment: Aja at 100% against MacroFactor's 71%. Aja also leads on rating (5.0 vs 4.8). MacroFactor's advantage is ratings volume (23K vs 26) and update cadence (every 8 days vs every 5 weeks). On price, ads, in-app purchases and monetization model 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. MacroFactor sells 11 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.
Aja holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: MacroFactor has 23K 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.
MacroFactor ships an update every 8 days, Aja every 5 weeks. The most recent releases landed on October 16, 2026 and September 22, 2026 respectively.
| Parameter | MacroFactor | Aja |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (23K ratings) | 5.0 (26 ratings) — better |
| Positive reviews | 70.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 23K — better | 26 |
| Update frequency | Every 8 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | #11 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 238 MB | 51 MB |
| Age rating | 9+ | 17+ |
| Developer | Stronger By Science Technologies LLC | Aja Nutrition LLC |
Customer experience
MacroFactor
Aja
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
MacroFactor
- Monthly Subscription14 Days trial$9.991 Month
- Monthly Subscription7 Days trial$11.991 Month
- Monthly Subscription$11.991 Month
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- 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$59.991 Year
- Annual Subscription7 Days trial$71.991 Year
- Annual Subscription14 Days trial$71.991 Year
- Annual Subscription Bundle$89.991 Year
Aja
- Aja Club7 Days trial$9.991 Month
- Aja Club$49.991 Year









