Comparison

SimpleStretch 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

SimpleStretch

This app provides a structured way to stretch your body in just 8 minutes. Choose from 4 body zones or a full-body routine with clear 3D animated exercises to quickly feel fit and flexible.

Highlights
  • 8-minute routines
  • 4 body zones
  • Full body stretching
  • 3D animated exercises
  • Intuitive control
  • Clear and quick
Features
Read full description

It’s very important to start your day with stretching after a long period of sleep or rest. SimpleStretch offers a range of exercises to stretch your body in a structured way. You can choose from 4 body-zones for specific exercises or stretch your whole body. In this way every body structure will be covered. With SimpleStretch it is possible to stretch every part of your body within 8 minutes in a clear, quick and simple way on the basis of very clear 3D animated example exercises. To quickly feel fit and flexible. Features: • Simple, clear and quick • In only 8 minutes • Choose from 4 body-zones • All body-structures will be covered • 3D-animated example exercises • Intuitive control Start your day Fit with Simple Stretch

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

SimpleStretch2 screens
123 Flex4 screens

Verdict

The call

The clearest difference is review sentiment: 123 Flex at 100% against SimpleStretch's 0%. 123 Flex also leads on rating (4.0 vs 1.0) and update cadence (every 4 days vs every 11 months). SimpleStretch's advantage is monetization model (free vs freemium) and iOS requirement (9.0 vs 13.0). On price, ratings volume, ads and in-app purchases 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. SimpleStretch sells 5 one-off in-app purchases 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

123 Flex holds the better App Store score, 4.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of SimpleStretch's written reviews are positive against 100% of 123 Flex's.

UpkeepUpdate frequency

SimpleStretch ships an update every 11 months, 123 Flex every 4 days. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 5 level
SimpleStretch versus 123 Flex: the parameters behind the verdict, then further details
ParameterSimpleStretch123 Flex
PriceFreeFree
Rating1.0 (1 ratings)4.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings12 — better
Update frequencyEvery 11 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size18 MB78 MB
Age rating4+12+
DeveloperDev ITWeAnd Ltd

Customer experience

SimpleStretch

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

123 Flex

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

In-app purchases

5 purchases

SimpleStretch

One-time5
  • Upgrade armen$0.99
  • Upgrade nek & schouders$0.99
  • Upgrade voor rug & romp$0.99
Show 2 more
  • Upgrade benen & combi$0.99
  • Upgrade voor je hele lichaam$3.99
2 purchases

123 Flex

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

Questions

Is SimpleStretch free?
SimpleStretch 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, SimpleStretch or 123 Flex?
123 Flex is rated higher. SimpleStretch averages 1.0 out of 5 from 1 ratings, while 123 Flex averages 4.0 from 2 ratings.
Do SimpleStretch or 123 Flex have ads?
Neither SimpleStretch nor 123 Flex shows ads.
Which is updated more often, SimpleStretch or 123 Flex?
SimpleStretch ships an update every 11 months, and 123 Flex every 4 days. Most recently, SimpleStretch was updated on October 15, 2026 and 123 Flex on October 7, 2026.

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