Comparison

Flux vs Forge

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

Forge

Features
Read full description

The gym tracker built for serious lifters. Clean and fast by design — Forge gets out of your way so you can focus on the session. — LOG SMARTER — Weights pre-fill from your last session automatically. Log reps, weight, timed sets, bodyweight, and cardio distance. A rest timer counts down between sets and vibrates when you're ready to go again. — BUILD YOUR PROGRAM — Create structured training plans with multiple workout days, rep ranges, and target weights. Swap any exercise for a similar alternative and reorder on the fly. Forge tells you when it's time to increase the load. — 350+ EXERCISES — Browse a full library with animated demonstrations so you always know exactly how to perform every movement. — TRACK EVERY PR — Personal records are captured automatically. View your full session history and see your strength progress over time. — LOG YOUR ACTIVITY — Track non-workout activity — walks, sport, active recovery — from the Progress tab. Everything appears in one timeline so your Forge Coach has the full picture of your week. — CYCLE-AWARE TRAINING — Female athletes can log their menstrual cycle and receive phase-based training guidance. A home screen shortcut shows your current phase at a glance. — FORGE COACH — Your personal Forge Coach analyzes your recent sessions and tells you whether to train or rest today, what to focus on, and how your progress is trending — based on your actual data, not generic advice. Available with Forge Pro. — FORGE PRO — Upgrade to unlock Forge Coach, program generation, quick workouts, periodized training with deload weeks, strength curves, estimated 1RM, and weekly volume charts. Try Forge Pro free for 7 days. Cancel anytime before the trial ends and you won't be charged.

Screenshots

Flux4 screens
Forge4 screens

Verdict

The call

The clearest difference is update cadence: Flux at weekly against Forge's fortnightly. Forge's advantage is iOS requirement (15.1 vs 26.2). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flux sells 4 in-app purchases, starting at $2.99 per month and Forge sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flux ships an update weekly, Forge fortnightly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Flux versus Forge: the parameters behind the verdict, then further details
ParameterFluxForge
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone, iPod — better
Requires iOS26.215.1 — better
Further details — not scored
Size47 MB47 MB
Age rating4+4+
DeveloperDigital Flux LtdFour Dimensional Ltd

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

Forge

Subscriptions2
  • Forge Pro Monthly7 Days trial$7.991 Month
  • Forge Pro Annual7 Days trial$49.991 Year
One-time1
  • Forge Pro Lifetime$149.99

Questions

Is Flux free?
Flux is free to download, with in-app purchases available.
Is Forge free?
Forge is free to download, with in-app purchases available.
Do Flux or Forge have ads?
Neither Flux nor Forge shows ads.
Which is updated more often, Flux or Forge?
Flux ships an update weekly, and Forge fortnightly. Most recently, Flux was updated on October 21, 2026 and Forge on October 24, 2026.

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