Comparison

Start Stretching 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

Start Stretching

Improve your physical flexibility with guided stretches designed for beginners. This app offers simple instructions and a built-in timer to make daily stretching convenient. Track your progress and integrate with your health app to monitor your fitness journey.

Highlights
  • Beginner-level stretches
  • Easy-to-follow graphics and instructions
  • Configurable stretch durations
  • Built-in timer
  • Health app integration
  • Statistics tracking
  • Automatic stretch cycling
Read full description

Start Stretching is a stretching coach intended for healthy individuals who are seeking to improve their physical flexibility. The app is an entry point into the world of flexibility training for anyone with the capability to perform a few basic movements. The app features a routine of beginner level stretches designed to help people improve their health and mobility, whether you have a minute or 10 to spare each day. Simple graphics with easy to follow instructions and a built-in timer make stretching convenient. Integration with the Health app allows tracking stretching time as a workout. ---------------------------------------- Why Stretch With Start Stretching? ---------------------------------------- - Basic stretches, clearly described – both textually and graphically - Configurable stretch durations for difficulty adjustment - Integration with the Health app to record your stretching workouts - Statistics tracking - Stretch hold length timing - Automatic cycling through the stretch routine

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

Start Stretching4 screens
123 Flex4 screens

Verdict

The call

The clearest difference is rating: Start Stretching at 4.6 against 123 Flex's 4.0. Start Stretching also leads on ratings volume (3.6K vs 2). 123 Flex's advantage is ads (none vs shown) and update cadence (every 4 days vs every 4 months). On price, in-app purchases, monetization model 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. Start Stretching sells 1 one-off in-app purchase 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

Start Stretching holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Start Stretching has 3.6K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 80% of Start Stretching'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

Start Stretching ships an update every 4 months, 123 Flex every 4 days. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Start Stretching versus 123 Flex: the parameters behind the verdict, then further details
ParameterStart Stretching123 Flex
PriceFreeFree
Rating4.6 (3.6K ratings) — better4.0 (2 ratings)
Positive reviews79.8% of reviews100.0% of reviews — better
Number of ratings3.6K — better2
Update frequencyEvery 4 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size9 MB78 MB
Age rating4+12+
DeveloperYogasoft ApplicationsWeAnd Ltd

Customer experience

Start Stretching

All ratings3,509 ratings
Positive90.7%
Neutral4.3%
Negative5.0%
Written reviews243 reviews
Positive79.8%
Neutral4.9%
Negative15.2%

123 Flex

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

Bugs and requests

Start Stretching

Reported bugs

2 issues
  • Occasional freezing or looping issues
  • Inconsistent behavior with left/right stretch variations

Requested features

4 requests
  • More stretching exercises and routines
  • Ability to create custom stretching programs
  • Guided audio or video instructions
  • Integration with fitness tracking apps

123 Flex

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Start Stretching

One-time1
  • Start Stretching Premium$1.99
2 purchases

123 Flex

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

Questions

Is Start Stretching free?
Start Stretching 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, Start Stretching or 123 Flex?
Start Stretching is rated higher. Start Stretching averages 4.6 out of 5 from 3.6K ratings, while 123 Flex averages 4.0 from 2 ratings.
Do Start Stretching or 123 Flex have ads?
Start Stretching shows ads; 123 Flex does not.
Which is updated more often, Start Stretching or 123 Flex?
Start Stretching ships an update every 4 months, and 123 Flex every 4 days. Most recently, Start Stretching was updated on November 11, 2026 and 123 Flex on November 3, 2026.

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