Comparison

Sculpt by Science vs JustStretch | Flex & Mobility

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

Head to head
About

Sculpt by Science

This app offers a science-backed approach to health and fitness, acting as a support system for sustainable transformations. It aims to help users optimize performance, mitigate health risks, and improve sleep quality, empowering them to achieve their ideal physique and well-being.

Highlights
  • Science-backed fitness strategies
  • Sustainable health transformations
  • Risk mitigation for diseases
  • Improved sleep quality
  • Personalized coaching plans
  • Dream physique achievement
Features
Read full description

At Sculpt By Science, we embrace the principle of “UBUNTU” – recognizing that our well-being is intertwined with yours. We’re not just a fitness company; we’re your ultimate support system. In moments of uncertainty, consider us your last resort. Our team doesn’t stop at providing training plans; we examine your health and fitness, utilizing cutting-edge science and technology to ensure sustainable transformations. We’re committed to helping individuals worldwide optimize their performance, mitigate risks of cardiovascular disease, diabetes, and other illnesses, while improving sleep quality and longevity. If you’ve tried various programs and diets without success, it’s time for a change. At Sculpt By Science, we empower you with science-backed strategies for ultimate control over your body. Our goal? To see you thrive as the best, happiest, and most confident version of yourself! Let’s work together to achieve your dream physique! * App access requires paid coaching plan Terms of use: https://kahunas.io/terms-conditions Privacy policy: https://kahunas.io/privacy

About

JustStretch | Flex & Mobility

This app helps you build a daily stretching habit to improve flexibility, relieve pain, and boost overall well-being. It offers guided routines, custom workout creation, and multimedia instructions for all fitness levels.

Highlights
  • Daily stretching routines
  • Custom workout creation
  • Audio, image, and video guidance
  • Live instructor experience
  • Pain relief and injury prevention
  • Improved posture and sleep
Features
Read full description

Make Stretching a Daily Habit for a Healthier You Welcome to JustStretch, your go-to app for making stretching a seamless part of your daily routine. Our app is designed to help you enhance your flexibility and maintain your natural range of motion, no matter your age or fitness level. JustStretch Routines: - "Morning Energizer": Kickstart your day with stretches that boost energy and prepare your body for the day ahead. - "Desk Break": Counteract the effects of sitting with these seated stretches that target the shoulders, back, and neck. - "Full Body Flow": A comprehensive routine that targets key muscles and joints throughout your entire body. - "Relax & Unwind": Gentle stretches to help you relax and prepare for a restful night's sleep. - "Flexibility Challenge": Advanced routines for those looking to push their flexibility to new heights. Create Custom Workouts Design personalized stretching routines to meet your fitness goals. Multimedia Guidance Choose from audio, image, or video instructions for clear guidance on every move. Favorite Workouts at a Glance Save your favorite sessions for quick and easy access. Live Instructor Experience Enjoy the motivation and accuracy of real instructor-led classes from anywhere. Easy-to-Use Interface: JustStretch guides you through each stretch with custom illustrations and a built-in timer. Detailed instructions and benefits are provided for every exercise Benefits of Stretching with JustStretch: - Enhanced Flexibility: Boost your muscle and joint mobility for a greater range of motion. - Pain Relief: Alleviate discomfort in key areas like the lower back, neck, hips, and shoulders. - Safety in Motion: Lower your risk of injuries during sports and other physical activities. - Better Sleep & Energy: Improve sleep quality and maintain high energy levels throughout the day. - Posture & Strength: Strengthen your core and improve your posture for better overall alignment. - Stress Management: Reduce stress and anxiety with regular stretching sessions. - Performance Enhancement: Boost your athletic performance with increased agility and strength. - Circulation Improvement: Enhance blood flow for overall health and well-being. - Rapid Recovery: Speed up muscle recovery after workouts or physical exertion. - Balance & Coordination: Improve your balance and coordination for better body control. - Pain Elimination: Target and eliminate chronic pain in the lower back, neck, and hips. - Well-being: Elevate your overall well-being with improved posture and reduced stress. Why JustStretch? - Simple & Affordable: Access hundreds of stretches and yoga poses, all designed to be easy on the wallet and simple to follow. - Convenient Routines: Choose from a variety of quick and convenient stretching routines that fit into any schedule. - All Ages & Levels: Whether you're a beginner or an experienced yogi, JustStretch has routines tailored for you. Workout where you want, when you want. From stretching and meditation to outdoor and bending, the JustStretch App makes bend workout classes and workout tracking fun and easy. No equipment is needed. Here are dozens of beginner-friendly bend classes that are easy to learn and perform, including Shoulders, Arms, Chest, Lower Back, Abdomen, Hips, Legs, and Ankle. Start your day with a bend workout that suits your needs. Choose to increase flexibility, improve strength, maintain good posture, or get fit and healthy! Download juststretch classes,take them with you wherever you go. You can practice in your living room, hotel, beach, or even sitting on a chair or sofa.yoga,making it easy to stay active and healthy no matter where bend. Feedback & Support: We're here to help! Contact us at support@juststretch.fit with any questions, feedback, or suggestions. Privacy Policy: https://www.juststretch.fit/en/privacy-policy.html User Terms of Service: https://www.juststretch.fit/en/terms.html

Screenshots

Sculpt by Science3 screens
JustStretch | Flex & Mobility4 screens

Verdict

The call

The clearest difference is in-app purchases: Sculpt by Science at none against JustStretch | Flex & Mobility's 18. Sculpt by Science also leads on ads (none vs shown) and rating (5.0 vs 4.7). JustStretch | Flex & Mobility's advantage is ratings volume (2.4K vs 1) and update cadence (every 3 weeks vs every 6 weeks). On price, 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. JustStretch | Flex & Mobility sells 17 in-app purchases, starting at $7.49 per month. Sculpt by Science asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sculpt by Science holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: JustStretch | Flex & Mobility has 2.4K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Sculpt by Science ships an update every 6 weeks, JustStretch | Flex & Mobility every 3 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
Sculpt by Science versus JustStretch | Flex & Mobility: the parameters behind the verdict, then further details
ParameterSculpt by ScienceJustStretch | Flex & Mobility
PriceFreeFree
Rating5.0 (1 ratings) — better4.7 (2.4K ratings)
Positive reviews—64.1% of reviews
Number of ratings12.4K — better
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size51 MB104 MB
Age rating17+17+
DeveloperMichael Gino DiamondsTechPioneers Limited

Customer experience

Sculpt by Science

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

JustStretch | Flex & Mobility

All ratings2,419 ratings
Positive92.8%
Neutral2.0%
Negative5.2%
Written reviews799 reviews
Positive64.1%
Neutral2.9%
Negative33.0%

Bugs and requests

Sculpt by Science

Not enough reviews yet to summarise bugs or requests.

JustStretch | Flex & Mobility

Reported bugs

2 issues
  • App not working after latest update
  • Inability to open app on certain devices

Requested features

2 requests
  • Preparation time before transitions
  • Ability to use app on multiple devices

In-app purchases

None

Sculpt by Science

No in-app purchases

17 purchases

JustStretch | Flex & Mobility

Subscriptions15
  • 1 Month Premium$7.491 Month
  • 1 Month Premium$9.991 Month
  • 1 Month Premium$19.991 Month
Show 12 more
  • 3 Months Premium$19.993 Months
  • 3 Months Premium$29.993 Months
  • 12 Months Premium$29.991 Year
  • LUCKY DRAW PRIZE$29.991 Year
  • 12 Months Premium$30.991 Year
  • 12 Months Premium$35.991 Year
  • 12 Months Premium$37.991 Year
  • One Year Membership$39.991 Year
  • 12 Months Premium$47.991 Year
  • 7-Day Free Trial7 Days trial$47.991 Year
  • one year membership$49.991 Year
  • 12 Months Premium$89.991 Year
One-time2
  • Stretch Guide Ebook Bundle$9.99
  • Stretch Guide Ebook Bundle$12.99

Questions

Is Sculpt by Science free?
Sculpt by Science is free to download, with no in-app purchases.
Is JustStretch | Flex & Mobility free?
JustStretch | Flex & Mobility is free to download, with in-app purchases available.
Which has better reviews, Sculpt by Science or JustStretch | Flex & Mobility?
Sculpt by Science is rated higher. Sculpt by Science averages 5.0 out of 5 from 1 ratings, while JustStretch | Flex & Mobility averages 4.7 from 2.4K ratings.
Do Sculpt by Science or JustStretch | Flex & Mobility have ads?
JustStretch | Flex & Mobility shows ads; Sculpt by Science does not.
Which is updated more often, Sculpt by Science or JustStretch | Flex & Mobility?
Sculpt by Science ships an update every 6 weeks, and JustStretch | Flex & Mobility every 3 weeks. Most recently, Sculpt by Science was updated on October 30, 2026 and JustStretch | Flex & Mobility on October 31, 2026.

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