Comparison

Stronger vs Flexius

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

Head to head
About

Stronger

This app helps serious lifters plan and track their workouts with AI coaching and community features. Log sets, reps, and weights, and monitor progress with powerful analytics to achieve your fitness goals.

Highlights
  • AI-optimized workout planner
  • Advanced exercise tracker
  • Customizable workout routines
  • Lifting groups and challenges
  • Strength score benchmarking
  • Visual exercise guidance
Features
Read full description

Built for lifters who take their training seriously. Trusted by over 1 million athletes worldwide, Stronger is the simple and intuitive workout planner to help you crush your fitness goals. Track your workouts, receive AI coaching, and compete with your friends. Whether you want to build strength, lose weight, or simply stay consistent, Stronger is your perfect gym companion. WHY STRONGER? Join a global community of athletes logging their workouts, smashing fitness goals, and supporting each other. EVERYTHING YOU NEED TO TRAIN SMARTER - Workout Planner: Access hundreds of exercises tailored for every muscle group, with AI recommendations to optimise your training - Advanced Tracker: Easily log sets, reps, and weights, and track progress with powerful analytics - Warm-Up and Drop Sets: Record how much effort you're putting into every rep - Custom Workout Routines: Save your favourite exercises in personalised routines for structured, efficient training - Lifting Groups: Join or create groups to stay motivated and compete in challenges - Strength Score: Benchmark your strength and build a balanced physique - Customised Routines: Generate plans tailored to your goals - Warm-Up Tracking: Prep effectively and track warm-ups separately - Visual Guidance: Learn new lifts with detailed instructional GIFs FOR EVERY FITNESS JOURNEY Beginner or pro, Stronger supports you every step of the way: - Focus on specific muscle groups like shoulders, chest, or legs - Plan routines for strength, hypertrophy, or fat loss - Track total volume, rep max, and lifting history READ WHAT USERS SAY - "I'm a personal trainer and use Stronger every day—best app out there" - "Best workout tracker. I've been using Stronger for three months now. I've tried Jefit, Strong, and Hevy, and Stronger is the clear winner." - "This app is a game changer for my workouts. Five stars!" - "One of the best apps I've ever bought." GET STARTED TODAY Download now and start your free 7-day trial. Join a thriving community of lifters redefining strength training. Together, let's lift Stronger! STRONGER PRO Stronger PRO is available via auto-renewing monthly or annual subscription. Start with a free 7-day trial to explore all features. A subscription is required for full access after the trial period. If you choose not to subscribe, you'll retain free access to the Workout Planner and Visual Guidance. Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your Account Settings after purchase. TERMS & SUPPORT Have a question or suggestion? Reach out at [stronger@strongermobileapp.com](mailto:stronger@strongermobileapp.com). Privacy Policy: https://www.strongermobileapp.com/privacy-policy Terms of Service: https://www.strongermobileapp.com/terms-of-use

About

Flexius

This guided stretching and mobility app helps users build consistent habits to improve flexibility and reduce stiffness. It offers timed routines with clear instructions, allowing users to easily follow along at home or the gym without needing to plan their sessions.

Highlights
  • Guided stretching routines
  • Timed stretches with instructions
  • Hold-to-start daily sessions
  • Routine setup based on goals
  • Weekly streak and progress tracking
  • Stretch catalog and custom builder
Features
Read full description

Build mobility you actually stick with. Flexius is a guided stretching and mobility app built for fighters, athletes, and busy people who want to move better without overthinking what to do. No planning. No guessing. No clutter. Open the app, hold to start, and follow a routine built to help you stay consistent. STOP THINKING ABOUT STRETCHING. JUST DO IT. Flexius is designed for the moments when you know you should stretch, but you do not want to build a routine from scratch. The app guides you through timed stretches, simple transitions, and clean routines you can follow at home, at the gym, after training, or whenever your body feels stiff. WHAT FLEXIUS HELPS YOU DO: • Build a consistent stretching habit • Improve flexibility and mobility over time • Feel less stiff before or after training • Support recovery between workouts • Follow guided routines without planning • Save routines you want to repeat • Track your weekly momentum CORE FEATURES: • Fully guided stretching routines • Timed stretches with clear instructions • Hold-to-start daily session flow • Routine setup based on your goals • Routine preview before you begin • Saved routines for repeat sessions • Stretch catalog and custom routine builder • Weekly streak and progress tracking • Clean Mint Cheer design • No ads or social feed BUILT FOR REAL LIFE: Flexius is for people who train hard, sit too much, feel stiff, or keep skipping mobility work because it feels like one more thing to plan. Whether you are: • Training combat sports or martial arts • Lifting, running, or playing sports • Trying to recover better between sessions • Working long days and feeling tight • Starting a simple mobility habit Flexius gives you a clear path: open the app, press start, and follow. FLEXIUS MEMBERSHIP: Start with a 3-day free trial. After the trial, Flexius Membership renews annually unless canceled through your Apple account settings. Membership unlocks the guided Flexius experience, including routine generation, saved routines, custom routine options, progress tracking, and the full mobility flow. Payment is charged to your Apple ID. Your subscription automatically renews unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription in App Store account settings. SIMPLE. FOCUSED. BUILT TO HELP YOU STAY CONSISTENT. Stop skipping your stretching. Open Flexius. Start the routine. Move better. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://flexius.io/privacy

Screenshots

Stronger4 screens
Flexius4 screens

Verdict

The call

The clearest difference is update cadence: Stronger at every 3 days against Flexius's every 3 weeks. Stronger also leads on ratings volume (17K vs 2) and chart position (#195 vs unranked). Flexius's advantage is rating (5.0 vs 4.8). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Stronger sells 15 in-app purchases, starting at $9.99 per month and Flexius sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Flexius holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Stronger has 17K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Stronger ships an update every 3 days, Flexius every 3 weeks. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 7 level
Stronger versus Flexius: the parameters behind the verdict, then further details
ParameterStrongerFlexius
PriceFreeFree
Rating4.8 (17K ratings)5.0 (2 ratings) — better
Positive reviews49.2% of reviews—
Number of ratings17K — better2
Update frequencyEvery 3 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
Best chart rank#195 — better—
DevicesiPhone, iPodiPhone, iPod
Requires iOS14.0 — better15.1
Further details — not scored
Size219 MB46 MB
Age rating4+17+
DeveloperAtlas Smart Technologies LTDGeorge Levy

Bugs and requests

Stronger

Reported bugs

4 issues
  • App crashes on opening
  • Workout logging not working correctly
  • Inability to edit or delete past workouts
  • Progress data disappearing or not syncing

Requested features

6 requests
  • Add more exercise variations
  • Integrate cardio tracking
  • Allow customization of muscle groups
  • Add timer and rest period features
  • Enable kg to lbs conversion
Show 1 more
  • Improve social features and group functionality

Flexius

Not enough reviews yet to summarise bugs or requests.

In-app purchases

15 purchases

Stronger

Subscriptions15
  • Stronger PRO Monthly$9.991 Month
  • Stronger PRO$12.991 Month
  • Stronger Pro Monthly$12.991 Month
Show 12 more
  • STRONGER MONTHLY$14.991 Month
  • STRONGER PRO$19.991 Year
  • Stronger PRO Annual7 Days trial$29.991 Year
  • Stronger PRO Annual7 Days trial$39.991 Year
  • STRONGER PRO3 Days trial$39.991 Year
  • Stronger PRO Annual$39.991 Year
  • Stronger PRO annual7 Days trial$49.991 Year
  • Stronger PRO Annual7 Days trial$49.991 Year
  • STRONGER PRO ANNUAL7 Days trial$69.991 Year
  • Stronger PRO7 Days trial$69.991 Year
  • Stronger PRO Annual$69.991 Year
  • STRONGER PRO ANNUAL7 Days trial$89.991 Year
2 purchases

Flexius

Subscriptions2
  • Monthly subscription$4.991 Month
  • Yearly subscription3 Days trial$34.991 Year

Questions

Is Stronger free?
Stronger is free to download, with in-app purchases available.
Is Flexius free?
Flexius is free to download, with in-app purchases available.
Which has better reviews, Stronger or Flexius?
Flexius is rated higher. Stronger averages 4.8 out of 5 from 17K ratings, while Flexius averages 5.0 from 2 ratings.
Do Stronger or Flexius have ads?
Neither Stronger nor Flexius shows ads.
Which is updated more often, Stronger or Flexius?
Stronger ships an update every 3 days, and Flexius every 3 weeks. Most recently, Stronger was updated on October 17, 2026 and Flexius on October 2, 2026.

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