Comparison

Flux vs MacroStack AI

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

Head to head
About

Flux

This app helps you train smarter by generating personalized workouts based on your goals, available equipment, and time. It uniquely adapts to your progress over time, keeping all your data on your device for privacy. Track every set, rep, and weight with ease, and benefit from advanced features like progressive overload and fatigue-aware training.

Highlights
  • Personalized workout generation
  • Customizable routines and exercises
  • Real-time adaptive changes
  • Progressive overload and periodisation
  • Fatigue-aware training support
  • Apple Health integration
  • Data export
Features
Read full description

Walk into the gym with a plan. Leave knowing what to aim for next. Flux creates personalized gym routines around your goals, experience, schedule, session length and available equipment. See your whole workout in one scrolling view, log sets with less screen switching and keep past performance close when choosing your next targets. TRY EVERY FEATURE FREE Download Flux free and use every feature for 14 days. No payment is required, the trial does not start a subscription and there is no automatic charge. UNLOCK FOREVER After the trial, training features require a one-time Lifetime Unlock. There is no free training tier after the trial and no recurring charge. Apple shows the price for your storefront before you confirm. Eligible existing paid owners keep permanent Full Access. PLAN AROUND YOUR LIFE - Generate Push/Pull/Legs, Upper/Lower, Full Body and other routines - Match training to your equipment, schedule and available weight increments - Choose a session length from 30 to 90 minutes when generating a routine - Build your own routines and custom exercises - Browse prebuilt programs with Overview, Guide and Settings before choosing - Follow Flux Hybrid for strength and timed cardio - Swap exercises for a workout or across the remaining program where supported CHOOSE YOUR STRENGTH PERIODIZATION - Adaptive Block: goal-appropriate phases with completion and recovery checks - Daily Undulating: different strength-day emphases across your routine - Linear: a six-week progression of training emphasis - Weekly Undulating: routine-wide emphasis that changes by model week - Manual: choose an eligible phase, with safety recovery when needed Choose a model when generating a strength routine. To change models, generate a new routine. Prebuilt programs keep their authored progression; HIIT keeps its timed prescription. Personalized features need calibration and sufficient training history. FOLLOW YOUR WORKOUT IN ONE PLACE - Log sets with less screen switching and see what is done and what comes next - Keep warm-ups and working sets together, with rest timers and set targets - Move on easily: the next unfinished exercise comes into view automatically - Use individual set targets, supersets, drop sets, myo-reps and giant sets - Add sets and notes, or open Edit, Swap and Remove from your workout - Review achieved sets, missed targets, next-session guidance and trained muscles in Workout Complete EDIT SETS AND CHECK PROGRESS IN ONE PLACE Choose your next targets with past performance close by. Edit sets in Settings, then switch to Stats in the same exercise details screen for performance charts, volume trends and previous workouts. Pick a date range to see recent sessions or the longer trend. Available from your workout, Next Up or saved routine, with history across routines. Future prebuilt target restrictions still apply. UNDERSTAND YOUR TRAINING - Review Strength, Health, Consistency and Targets hit in Insights - Follow your current routine from the day you started it - Revisit findings saved with your Check-in reports - See your training phase and position in Routine Overview - Use optional Apple Health sleep, HRV and heart-rate context - Export training data and use optional signed-in cloud backup MAKE FLUX YOURS Choose System, Light or Dark in Profile > Theme. Signed-in choices sync; System follows each device. Home widgets and Live Activities follow where iOS permits. Log offline with valid access. An already-open workout can be finished after trial expiry; returning after expiry shows the paywall. Restore Purchases and Account & Data remain available. Cloud backup syncs separately when online. Apple Health is optional. Learn more: https://fluxworkouts.com Support: https://fluxworkouts.com/support Terms: https://fluxworkouts.com/terms Privacy: https://fluxworkouts.com/privacy

About

MacroStack AI

This app uses your logged food and weigh-ins to adaptively adjust your calorie and macro goals weekly. It reveals your body's actual calorie burn and forecasts your progress, offering personalized insights and meal suggestions.

Highlights
  • Adaptive calorie goal recalibration
  • Revealed TDEE calculation
  • Weekly goal adjustments with explanations
  • Offline food database with barcode scanner
  • AI food scanner for unlabeled items
  • AI nutrition coach for meal suggestions
  • Optional fasting timer
Read full description

Most calorie apps hand you a goal from a formula and never check if it works. MacroStack checks every week. It compares what you logged against how your weight actually moved, reveals what your body really burns, and retunes your goal. THE ADAPTIVE ENGINE A textbook formula can only guess your metabolism, and your metabolism changes as you diet. A static goal quietly stops working. MacroStack treats your own results as the source of truth: - Revealed TDEE: the calories your body actually burns, computed from your logs and weigh-ins - Weekly recalibration that adjusts your goal and explains every change in plain language - A weight trend that smooths daily scale noise into a line you can trust - A forecast of where you are heading once enough data lands - Steady when the data says steady. No random goal churn. Cutting, bulking, or maintaining, it works the same way: your results drive your targets. TRACK FAST - 395,000+ foods, searchable offline - Barcode scanner - Popular restaurant items built in - Custom foods and recipes - Today at a glance: progress ring, remaining calories, and a bar for every macro - Home screen widgets and streaks AI FOOD SCANNER No label and no barcode? Point the camera at your plate and get calorie and macro estimates in seconds. AI NUTRITION COACH Ask what to eat. The coach answers with your numbers in front of it: remaining calories, protein gap, current goal. Meal ideas, weekly meal plans, and progress summaries grounded in your actual data. FASTING, IF YOU WANT IT An optional fasting timer with eating window reminders. PRIVATE BY DESIGN No account, no signup. Your log lives on your device and works offline. Export anytime, with encrypted backups when you want them. Set a goal, log your food, step on the scale. The engine does the rest. MEMBERSHIP Full access to MacroStack requires a subscription or a one-time Lifetime purchase. There is no limited free version. - Monthly: $3.99 per month, includes a 14-day free trial - Annual: $34.99 per year, includes a 14-day free trial - Lifetime: $59.99, a one-time purchase (no trial) The Monthly and Annual plans begin with a 14-day free trial. Payment is charged to your Apple Account when the trial ends unless you cancel at least 24 hours before it ends. These subscriptions renew automatically at the listed price unless auto-renew is turned off at least 24 hours before the end of the current period. The Lifetime option is a single payment charged at the time of purchase and does not renew. You can manage or cancel a subscription anytime in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://rrexhepi.github.io/macrostack-privacy/

Screenshots

Flux4 screens
MacroStack AI4 screens

Verdict

The call

The clearest difference is monetization model: Flux at freemium against MacroStack AI's subscription. Flux also leads on update cadence (weekly vs every 2 weeks). MacroStack AI's advantage is iOS requirement (17.0 vs 26.2). On price, rating, ratings volume and ads 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. Flux sells 4 in-app purchases, starting at $2.99 per month and MacroStack AI sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Flux against 5.0 for MacroStack AI. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Flux ships an update weekly, MacroStack AI every 2 weeks. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
Flux versus MacroStack AI: the parameters behind the verdict, then further details
ParameterFluxMacroStack AI
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium — betterSubscription
DevicesiPhoneiPhone
Requires iOS26.217.0 — better
Further details — not scored
Size47 MB68 MB
Age rating4+4+
DeveloperDigital Flux LtdRexhep Rexhepi

Customer experience

Flux

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

MacroStack AI

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Flux

Subscriptions2
  • Flux Pro : 1 Month$2.991 Month
  • Flux Pro : 12 Month$19.991 Year
One-time2
  • Flux Pro : Lifetime Pass - Founder$49.99
  • Flux Pro : Lifetime Pass$59.99
3 purchases

MacroStack AI

Subscriptions2
  • MacroStack Monthly14 Days trial$3.991 Month
  • MacroStack Annual14 Days trial$34.991 Year
One-time1
  • MacroStack Lifetime$59.99

Questions

Is Flux free?
Flux is free to download, with in-app purchases available.
Is MacroStack AI free?
MacroStack AI is free to download, with in-app purchases available.
Which has better reviews, Flux or MacroStack AI?
Flux and MacroStack AI are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Flux or MacroStack AI have ads?
Neither Flux nor MacroStack AI shows ads.
Which is updated more often, Flux or MacroStack AI?
Flux ships an update weekly, and MacroStack AI every 2 weeks. Most recently, Flux was updated on October 4, 2026 and MacroStack AI on October 9, 2026.

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