Comparison

123 Flex vs TRAIN

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

Head to head
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.

About

TRAIN

This app allows users to discover and create personalized workout plans from a global community. Track your progress, beat your personal records, and share your own routines with others. It's designed to be accessible for everyone, regardless of fitness level or goals.

Highlights
  • Discover user-created workouts
  • Create custom workout routines
  • Share workouts globally
  • Track personal records
  • Fitness plans for all goals
Features
Read full description

FITNESS FOR EVERYONE No matter your age, gender or ambitions, TRAIN has workouts from users around the world who want to help YOU achieve your goals. PREPARE TO SUCCEED Failing to prepare is preparing to fail. You need a plan to reach your goal. Find your plan on TRAIN. CREATE AND SHARE Make your own workouts and share them with users across the world. BEAT YOUR BEST TRAIN saves your records, so you can beat them every time your workout. FREE FOR ALL There is no paid plan or in app purchases. TRAIN is free for everybody.

Screenshots

123 Flex4 screens
TRAIN4 screens

Verdict

The call

The clearest difference is in-app purchases: TRAIN at none against 123 Flex's 2. 123 Flex's advantage is update cadence (every 4 days vs fortnightly) and iOS requirement (13.0 vs 16.0). On price, review sentiment, ads 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. 123 Flex sells 2 in-app purchases, starting at $9.99 per month. TRAIN asks for nothing beyond the download.

UpkeepUpdate frequency

123 Flex ships an update every 4 days, TRAIN fortnightly. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 6 level
123 Flex versus TRAIN: the parameters behind the verdict, then further details
Parameter123 FlexTRAIN
PriceFreeFree
Rating4.0 (2 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings2 — better—
Update frequencyEvery 4 days — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size78 MB31 MB
Age rating12+12+
DeveloperWeAnd LtdTHOMAS MARK CURNOW

Customer experience

123 Flex

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

TRAIN

Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

123 Flex

Subscriptions2
  • Premium Monthly7 Days trial$9.991 Month
  • Premium Yearly7 Days trial$59.991 Year
None

TRAIN

No in-app purchases

Questions

Is 123 Flex free?
123 Flex is free to download, with in-app purchases available.
Is TRAIN free?
TRAIN is free to download, with no in-app purchases.
Do 123 Flex or TRAIN have ads?
Neither 123 Flex nor TRAIN shows ads.
Which is updated more often, 123 Flex or TRAIN?
123 Flex ships an update every 4 days, and TRAIN fortnightly. Most recently, 123 Flex was updated on October 7, 2026 and TRAIN on October 2, 2026.

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