MotionLabMotionLab vs StretchIt
Measurable functional mobility, not just guided flexibility classes
StretchIt provides guided flexibility training through structured video classes — an effective format for people working toward specific flexibility goals like splits or overhead range. If your goal is raw flexibility improvement through instructor-led content, it works well. MotionLab is built around a different objective: functional mobility that is measured, sport-specific, and adaptive. It starts with an assessment of your current joint mobility, generates sessions from your scores, and tracks measurable improvement across 10 areas of the body over time.
Feature comparison
AI session generation
Joint mobility assessment & scoring
Per-joint progress tracking
Sport-specific sessions
22+ supported sports
Pre-workout activation mode
Post-workout recovery mode
Custom body zone targeting
Session length 7–25 min
Free tier available
StretchIt has limited free content
Mobile app
Why athletes switch from StretchIt to MotionLab
Functional mobility, not just flexibility
Flexibility and mobility are related but distinct. Flexibility is passive range of motion — how far a joint can move. Mobility is active, controlled range under load — the range you can actually use during sport and training. StretchIt focuses on flexibility training through guided class content. MotionLab focuses on functional mobility: assessing each joint area, identifying where restrictions limit your training, and building sessions that address those restrictions with active and passive work combined. The outcome is better movement, not just longer holds.
Sessions generated from your joint scores, not selected from a class library
StretchIt's format requires you to find and select a class from a content library. MotionLab generates a session built directly from your current data. Your mobility assessment scores across 10 joint areas determine what gets prioritised. If your ankles and hip flexors are your most restricted areas, your next session reflects that — without you having to identify, search for, and select the right class yourself. The system does that automatically.
Sport-specific programming for 22 sports
StretchIt's content is general — classes for splits, backbends, hamstrings, and shoulders without reference to specific sporting demands. MotionLab builds sessions around your sport. A pre-workout session for a swimmer looks different from one for a rugby player — different muscle groups, different activation patterns, different priority areas. This specificity matters most in the weeks before competition, during high-load training blocks, and during recovery periods where the wrong mobility work can interfere with training adaptation.
Who each app is best for
Choose MotionLab if…
- ✓Athletes who need mobility work tied to a specific sport and training phase
- ✓People who want to measure joint mobility improvement over time with objective scores
- ✓Anyone who wants sessions automatically generated from their data, not manually selected
- ✓Users who want a free tier before committing to a subscription
Stick with StretchIt if…
- →People with specific flexibility goals like achieving splits or improving overhead range
- →Users who prefer a class-based format with instructor guidance throughout
- →Anyone whose primary goal is passive flexibility rather than sport-specific functional mobility
Try MotionLab free
Start with the mobility assessment — 2 minutes to see your joint scores and what your first session should prioritise.
Get started free