Comparison

Stretching Mobility vs 123 Flex

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

Head to head
About

Stretching Mobility

This app offers guided flexibility and mobility training to improve athletic performance, reduce pain, and increase range of motion. It provides personalized recommendations, curated programs, and challenges to help users build a consistent stretching habit and achieve their fitness goals.

Highlights
  • Flexibility training for splits and backbends
  • Mobility exercises for athletic performance
  • Personalized training recommendations
  • Curated flexibility and mobility programs
  • Flexibility challenges
  • Competition feature with leaderboards
  • Extensive video instruction library
Features
Read full description

FLEXIBILITY TRAINING & CONDITIONING - Get your front, middle, and standing splits - Improve your backbends - Gain strength to support your increased ROM - Accelerate your flexibility progress - Break through a flexibility plateau - Finally make stretching a habit - Join a flexibility challenge to reach your goals faster MOBILITY TRAINING - Improve athletic performance - Increase strength (at the end range of your motion) - Reach your full movement potential - Eliminate muscle stiffness - Fix muscular imbalances - Improve your overall agility - Decrease risk of injury - Function normally and pain-free through your daily activities FEEL-GOOD STRETCH SESSIONS - Recover sooner - Sleep better - Eliminate lower back pain, neck pain, and hip pain - Increase energy levels - Reduce stress, recharge, rewind - Improve posture PERSONALIZED TRAINING RECOMMENDATIONS STRETCHIT will recommend a class or a personal program based on your goals and training history. We'll ask your feedback after each class and guide you to the next one to help you safely push your flexibility thresholds. FLEXIBILITY & MOBILITY PROGRAMS Join one of the curated training programs to finally make stretching a habit and reach your full movement potential. COMPETITIONS (*NEW FEATURE) A new competition feature that allows users to compete by taking classes, earning points, and climbing the leaderboard. ALL SKILL LEVELS Our users range from those who never stretched before to cheerleaders, dancers, gymnasts, martial artists, surfers, CrossFit lovers, bodybuilders, trick riders, cyclists, runners, aerialists, personal trainers, golfers, moms, athletes, desk sitters, and yogis. All agree: if you want to get more flexible, STRETCHIT works. 100+ HOURS OF VIDEO INSTRUCTION New classes are released weekly. The classes are 5-45 min long. FULLY LOCALIZED AND TRANSLATED TO SPANISH, PORTUGUESE, ITALIAN, GERMAN, FRENCH. The app and all its content (including video classes) are available in English, Spanish, Portuguese, Italian, German, and French. Terms of Service and Privacy Policy: www.stretchitapp.com/terms-of-service CONTACT US Email: support@stretchitapp.com Training tips, daily inspiration, and weekly live streams: Instagram - @stretchitapp, @stretchitapp-espanol Facebook - STRETCHIT YouTube - @stretchitapp, @stretchitapp-espanol Hashtag #stretchitapp. We'd be happy to see your progress and feature you.

About

123 Flex

This app provides personalized stretching and flexibility routines based on your fitness goals and physical condition. It features AI-driven program generation, progress tracking, and visual demonstrations to guide your workouts.

Highlights
  • Personalized AI workout plans
  • Progress tracking and reassessments
  • 3D animated stretch demonstrations
  • Safety tips and injury precautions
  • Audio guidance for sessions
  • Offline workout mode
  • Motivation through rewards and challenges
Features
Read full description

Feel better and gain confidence with 123 Flex, the flexibility coach designed to empower and enhance your fitness and stretching routine. Choose us and get: A Detailed Surveyor Introduce your goals and health: • Current flexibility level • Specific fitness and flexibility goals (e.g., improving hamstring flexibility, mastering a split, other stretch goals) • Previous injuries or areas of concern in your stretch workouts • Preferred workout duration • Frequency of workout routines • Specific sports or activities they participate in during their fitness journey Matching you to a program: A robust AI system that processes your survey answers to generate a personalized stretching and workout routine. Progress Tracking: Track your flexibility progress over time, monitoring your workouts and routines, with periodic reassessments to adjust as you improve or as your goals change. Visual Demonstrations: 3D animated models showing correct form and technique for each stretch in your workout. Safety Tips: Include precautions for each stretch and workout, especially for users with specific past injuries. Feedback Loop: After each session, you are asked for feedback. Was the stretch or workout too easy or hard? Any pain? The AI learns from your routines. Reminders & Scheduling: Set reminders or schedule their stretching and fitness sessions. Variability: The AI shuffles workout routines or introduce new stretches to keep users engaged, ensuring they are working all relevant muscle groups during their fitness journey. Guided Sessions: Audio guidance for each stretching session, ensuring users hold the stretch for the appropriate amount of time and relax into each pose. Resource Library: A database of all stretches and workout benefits, possible variations, common mistakes, and progressions. Rewards, stretch badges, and challenges to keep you motivated throughout your fitness journey. Offline Mode: Allows you to download your routines and workouts, using them without an active internet connection. Note: 123 Flex is suitable for all ages and fitness levels. However, always consult your doctor or physiotherapist before starting any new fitness or stretching program.

Screenshots

Stretching Mobility4 screens
123 Flex4 screens

Verdict

The call

The clearest difference is rating: Stretching Mobility at 4.8 against 123 Flex's 4.0. Stretching Mobility also leads on ratings volume (15K vs 2). 123 Flex's advantage is review sentiment (100% vs 61%) and update cadence (every 4 days vs every 8 days). 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. Stretching Mobility sells 11 in-app purchases, starting at $4.99 per month and 123 Flex sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Stretching Mobility holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Stretching Mobility has 15K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 61% of Stretching Mobility's written reviews are positive against 100% of 123 Flex's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Stretching Mobility ships an update every 8 days, 123 Flex every 4 days. The most recent releases landed on September 24, 2026 and June 16, 2026 respectively.

Scorecard5 real differences · 5 level
Stretching Mobility versus 123 Flex: the parameters behind the verdict, then further details
ParameterStretching Mobility123 Flex
PriceFreeFree
Rating4.8 (15K ratings) — better4.0 (2 ratings)
Positive reviews60.9% of reviews100.0% of reviews — better
Number of ratings15K — better2
Update frequencyEvery 8 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS16.413.0 — better
Further details — not scored
Size140 MB78 MB
Age rating12+12+
DeveloperStretchIt, Inc.WeAnd Ltd

Customer experience

Stretching Mobility

All ratings15,101 ratings
Positive94.7%
Neutral2.3%
Negative3.0%
Written reviews591 reviews
Positive60.9%
Neutral7.6%
Negative31.5%

123 Flex

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Stretching Mobility

Reported bugs

3 issues
  • Video playback issues (freezing, crashing)
  • Inaccurate class difficulty labeling
  • Syncing issues with Apple Health

Requested features

5 requests
  • Calendar view to track progress
  • Ability to replace scheduled classes
  • More beginner-friendly and modified exercises
  • Handstand and other advanced skill training
  • Personalized recommendations based on feedback

123 Flex

Not enough reviews yet to summarise bugs or requests.

In-app purchases

11 purchases

Stretching Mobility

Subscriptions11
  • Full Body Stretch$4.991 Month
  • Full Body Stretch (trial)7 Days trial$4.991 Month
  • Get Your Splits$4.991 Month
Show 8 more
  • Get Your Splits (trial)7 Days trial$4.991 Month
  • Bendy Back$4.991 Month
  • Bendy Back (trial)7 Days trial$4.991 Month
  • Middle Split Stretch$4.991 Month
  • Middle Split Stretch (trial)7 Days trial$4.991 Month
  • Stretching flexibility Monthly7 Days trial$24.991 Month
  • Yearly7 Days trial$144.991 Year
  • Flexibility. Yearly7 Days trial$179.991 Year
2 purchases

123 Flex

Subscriptions2
  • Premium Monthly7 Days trial$9.991 Month
  • Premium Yearly7 Days trial$59.991 Year

Questions

Is Stretching Mobility free?
Stretching Mobility is free to download, with in-app purchases available.
Is 123 Flex free?
123 Flex is free to download, with in-app purchases available.
Which has better reviews, Stretching Mobility or 123 Flex?
Stretching Mobility is rated higher. Stretching Mobility averages 4.8 out of 5 from 15K ratings, while 123 Flex averages 4.0 from 2 ratings.
Do Stretching Mobility or 123 Flex have ads?
Neither Stretching Mobility nor 123 Flex shows ads.
Which is updated more often, Stretching Mobility or 123 Flex?
Stretching Mobility ships an update every 8 days, and 123 Flex every 4 days. Most recently, Stretching Mobility was updated on September 24, 2026 and 123 Flex on June 16, 2026.

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