Comparison

StabilityAI vs Flexius

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

Head to head
About

StabilityAI

Improve mobility, reduce discomfort, and build healthier movement habits with personalized routines and guided exercises. Track your progress and receive adaptive insights to enhance your journey towards better everyday movement.

Highlights
  • Personalized mobility plans
  • Guided daily training routines
  • Progress tracking and visual dashboards
  • Gamified progression systems (XP, ranks)
  • Adaptive exercise recommendations
  • Focus on back pain, hip, and knee discomfort
Features
Read full description

Move better. Feel better. Stay consistent. Stability helps you improve mobility, reduce discomfort, and build healthier movement habits through personalized routines, progress tracking, and guided exercises. * Personalized routines, progression features, and advanced tracking require an active subscription. A subscription includes a free trial where offered. Personalized Mobility Plans No generic routines. Whether you're working on back pain, tight hips, knee discomfort, posture, or overall mobility, Stability creates plans tailored to your goals, limitations, and progress. Guided Daily Training Know exactly what to do each day. Follow step-by-step mobility and strengthening routines designed to help you move better, stay consistent, and build lasting results. Track Your Progress Track workouts, mobility improvements, consistency, and recovery over time with simple visual dashboards and progress tracking tools. Level Up Your Mobility Stay motivated with progression systems designed to reward consistency. Earn XP, advance through ranks, and see your improvement reflected as you continue training. Insights That Adapt Your routine evolves with you. Stability uses your activity, progress, and goals to help recommend the right exercises and adjustments along your mobility journey. Built for Everyday Movement Whether you're dealing with stiffness, recovering from setbacks, improving posture, or simply wanting to move better, Stability helps you build a sustainable mobility practice that fits your life. Terms of Use: https://www.stabilityapp.org/terms · Privacy Policy: https://www.stabilityapp.org/privacy

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

StabilityAI4 screens
Flexius4 screens

Verdict

The call

The clearest difference is iOS requirement: Flexius at 15.1 against StabilityAI's 18.1. On price, rating, ratings volume and update cadence 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. StabilityAI sells 3 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

On the App Store both sit at effectively the same score — 5.0 for StabilityAI against 5.0 for Flexius. Both are backed by a comparable volume of ratings — 6 and 4 respectively.

UpkeepUpdate frequency

StabilityAI ships an update fortnightly, Flexius every 3 weeks. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
StabilityAI versus Flexius: the parameters behind the verdict, then further details
ParameterStabilityAIFlexius
PriceFreeFree
Rating5.0 (6 ratings)5.0 (4 ratings)
Positive reviews100.0% of reviews—
Number of ratings6 — better4
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.115.1 — better
Further details — not scored
Size43 MB46 MB
Age rating17+17+
DeveloperGriffin HuntGeorge Levy

In-app purchases

3 purchases

StabilityAI

Subscriptions3
  • Stability Premium (Monthly)3 Days trial$9.991 Month
  • Stability Premium (Yearly) 23 Days trial$19.991 Year
  • Stability Premium (Yearly)3 Days trial$29.991 Year
2 purchases

Flexius

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

Questions

Is StabilityAI free?
StabilityAI 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, StabilityAI or Flexius?
StabilityAI and Flexius are both rated 5.0 out of 5 on the App Store, from 6 and 4 ratings respectively.
Do StabilityAI or Flexius have ads?
Neither StabilityAI nor Flexius shows ads.
Which is updated more often, StabilityAI or Flexius?
StabilityAI ships an update fortnightly, and Flexius every 3 weeks. Most recently, StabilityAI was updated on October 31, 2026 and Flexius on November 5, 2026.

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