An Asymmetri Sports product · Motion v1.2
Asymmetri Motion
Measure. Track. Compare. Learn.
Track pitching mechanics over time and return to the evidence behind each result. Study a reference delivery, compare the same moment, and bring better questions to your coach.
Motion gives you measurements and evidence. You and your coach decide what they mean.
iPhone · iOS 17+ · Invitation required
Opens Google Forms. Invitations depend on beta availability.
Pitching mechanics, tracked over time. For iPhone.
iPhone · iOS 17 or later
Preparing for release
Motion v1.2 is in private TestFlight testing. Public App Store availability is still pending.
Watch a walkthrough
A quick look at Motion
This short introduction gives a feel for Motion. It’s preparing for release; the workflow and measurement limits are explained below.
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Why repeat the measurement?
Track what changes
- One pitch
- A measurement describes one observation: one pitch, a particular event, and the image you recorded.
- Repeated pitches
- Repeating the same measurement makes differences visible. Keep the camera view and event selection as consistent as you can.
- A history
- Investigate whether a difference persists, whether one pitch was an outlier, and what else changed during the same period.
Has my Stride Length changed? Is my Front Leg Block different? Does my Trunk Tilt look consistent across several sessions? Start with a question, then inspect the pitches behind it.
By view and event
What Motion tracks
Motion measures specific parts of the pitching delivery at repeatable moments. Tracking the same measurements across pitches helps you see how mechanics change over time, compare different periods, and return to the video behind every result.
Side View
Front Foot Contact
- Stride Length
- Tracks the distance between the feet at Front Foot Contact relative to the pitcher's setup reference. Follow it across pitches to see how the stride changes from session to session or during different periods of training.
- Front Leg Block
- Tracks the position of the lead leg when the front foot first lands. This gives you a repeatable look at how bent or extended the lead knee is as the pitcher moves into the final part of the delivery.
- Trunk Tilt
- Tracks the position of the torso at Front Foot Contact using the relationship between the shoulders and hips. Follow it across pitches to see how trunk position at landing changes over time.
Side View
Ball Release
- Front Leg Block
- Tracks lead-leg position again at Ball Release. Comparing this with Front Foot Contact helps show how the lead leg changes between landing and release, while repeated measurements let you follow that pattern over time.
- Trunk Tilt
- Tracks torso position at Ball Release. Together with the Front Foot Contact measurement, it gives you two repeatable snapshots of trunk position during an important part of the delivery.
Back View
Front Foot Contact
- 2D Lateral Trunk Lean
- Tracks the side-to-side position of the torso at Front Foot Contact using the relationship between the shoulders and hips. Follow it over time to see whether trunk position at landing is changing.
Back View
Ball Release
- 2D Shoulder–Upper Arm Angle
- Tracks the relationship between the shoulder line and the throwing upper arm at Ball Release. It gives you a repeatable way to follow how the upper arm is positioned as the ball is released.
- 2D Throwing-Side Shoulder–Wrist Orientation
- Tracks the direction from the throwing-side shoulder toward the wrist at Ball Release. Following this measurement across pitches can help reveal changes in the position and direction of the throwing arm at release.
For exact measurement methods and technical definitions, see Settings → About → Measurements in the app. Camera setup, event selection, and pose estimation can affect comparisons.
Record or import
Choose Record Pitch or Import Video from Photos. Back and Side View framing guides help you keep the pitcher in view. Optional Recording Setups reuse your view and guide choices.
Direct recording uses supported 240 or 120 fps camera modes. Availability depends on the iPhone. A Recording Setup is guidance, not camera calibration.
Mark the same meaningful events
Confirm Camera View and Throwing Arm. Scrub and fine-adjust to Front Foot Contact and Ball Release; Side View also uses a Setup Reference. Choose and confirm each exact frame so you can revisit the same event across pitches.
Measure
Choose Analyze Pitch for the available on-device, projected 2D measurements. Results depend on the view, your inputs and visible landmarks. If several people appear, Pitcher Selection lets you identify the pitcher to analyze.
Build history
Repeat the workflow across comparable recordings. My Pitches keeps each observation with its video, marks, results and evidence.
Compare
Use Explore to inspect two pitches, follow a measurement over time or compare two periods. New investigations start with all saved history; narrow the dates when needed. Save a question as a Saved View to return to it.
Look at performance and context
Examine measurements alongside the velocity, pitch type, location and result you recorded. Ask what changed during the same period.
Return to the evidence
Open the contributing pitch, exact event frame and saved annotated image. Check the landmarks and reference lines behind a difference. Save evidence to Photos or share it deliberately.
Learn with your coach
Bring the observations to a conversation. You and your coach decide what they mean, what to investigate next and what to keep tracking.
Behind a measurement
See where the number came from.
A change in history is worth looking at closely. Follow a measurement back to its pitch, exact event frame, and the landmarks and reference lines used to calculate it.
Source video
The pitch you recorded or imported.
Exact selected frame
A specific image you can return to.
Human-confirmed moment
The pitching moment you marked.
Projected 2D measurement
Geometry from the video image.
Annotated evidence
The landmarks and lines behind the result.
Pitch history
Saved observations to revisit and compare.
History stays connected to individual observations. Review the saved evidence before interpreting a pattern; if a source or evidence is unavailable, Motion shows that state.
Your pitching history
From one pitch to a pattern.
Explore is central to the work: follow your own measurements over time, then open the observations behind a difference.
- Compare two pitches
- Inspect a difference directly with A/B marked frames or a supported measurement. Open either pitch to review its evidence.
- Follow a measurement over time
- Measurement history starts with all saved history. Narrow the date window and other filters to investigate a question, then check the individual pitches behind a chart or summary.
- Compare periods
- Use Two periods to investigate what changed between earlier and later training dates. Save the question and its settings as a Saved View.
Saved Views retain their chosen date windows and filters. Keep the view, framing and event selection comparable. A date is not proof of a session, and a numerical difference alone does not establish improvement.
What changed with it?
Mechanics + performance
Mechanics history becomes more useful when you can investigate what else was happening during those pitches.
- Add the context you know
- Record velocity and its source, pitch type, chart-relative pitch location and outcome in Pitch Context. These are manual entries; Motion does not derive ball speed or determine the outcome from video.
- Look alongside the measurement
- Inspect recorded velocity and location with an exact measurement in Chart, Table or A/B comparison. Use supported context filters to narrow the pitches you are investigating. Leave unknown context unrecorded.
- Ask a specific question
- Did Stride Length change during a period of increased recorded velocity? Do harder pitches show a different 2D Lateral Trunk Lean in Back View? Do pitches with different outcomes share an observable pattern?
A relationship does not prove causation. Motion surfaces evidence for investigation. The athlete and coach decide what it means.
Study and compare in v1.2
Study a reference. Compare the same moment.
- Notes and pitch context
- Keep Athlete Notes and Pitch Notes alongside your work. Add pitch type, reported velocity, chart-relative location and result yourself; these are recorded context, not video-derived measurements.
- Reference Study
- Import authorized footage from Photos or Files into a separate Reference Library. Save and loop a delivery interval, step through the original frames, zoom for inspection, and add event marks, bookmarks and Reference Notes.
- Compare With My Pitch
- Review one personal pitch alongside a Reference. Use independent playback or align their manually marked Front Foot Contact or Ball Release for linked review. Saved Comparisons keep the pair and settings, reopen paused, and require deliberate alignment.
- Share a review
- Preview a Pitch Review PDF with your selected context, measurements and evidence. Notes, athlete display name and marked frames are included only when selected. Share Original Video is a separate action.
Reference comparison follows source-video time. Edited or slow-motion clips can differ from physical capture timing. References stay separate from your measurement history; Motion does not calculate the Reference subject’s biomechanics or identify an ideal delivery.
Learn Reference Study and comparison →Before you interpret a result
Measurements and evidence, not a mechanics grade.
- Camera position matters
- Measurements describe projected 2D geometry in the video image. Camera position and perspective affect what you see. Motion does not produce anatomical 3D biomechanics or laboratory-calibrated measurements.
- Landmarks can be missing
- Pose landmarks are estimates, and you confirm the pitching moments. Missing landmarks or unresolved ambiguity can leave a measurement unavailable. Motion does not fill the gap with an invented result.
- A coach brings the context
- You and your coach interpret the evidence. Motion does not label mechanics good or bad, prescribe changes, predict injury or provide medical advice.
Asymmetri Motion
One Motion family. Individual and team perspectives.
Pitching v1.2 is preparing for public release, Hitting is in development, and one professional Team app is planned. The family shares review technology while keeping pitching and hitting distinct.
Individual
Separate, focused apps for one athlete.
Pitching
Preparing for releaseThe Motion experience for iPhone: capture, projected 2D measurements, pitching history, Reference Study, event-aligned comparison and review sharing.
Motion v1.2 is in private TestFlight testing. Public App Store availability is still pending.
Explore the pitching experience →Hitting
In developmentA separate individual app in development for swing capture and review, manual event marks, notes, Reference Study, comparison and sharing.
Hitting measurements remain experimental. Real-footage validation and release preparation are still in progress; the app is not publicly available.
Professional
One app for coaches working with multiple athletes.
Team
PlannedA professional Motion app built around one account, organization, roster and Athlete identity system, with required Team Cloud for shared records and cross-device work.
Planned for coaches and rosters. Team Pitching, Team Hitting and Team Baseball are entitlement configurations inside this one app.
- Team Pitching
- Pitching module
- Team Hitting
- Hitting module
- Team Baseball
- Both modules
Adding the second module keeps the same account, organization, roster, Athlete identities and Cloud data.
Team Cloud will use finite, quota-aware storage. Exact plans and storage allowances are still to be decided.
Further ahead
Planned Dual View capture pairs two iPhones for reviewing two views of a pitch, with one phone controlling the Companion Camera. It is outside v1.2 and does not promise 3D reconstruction. Team productionization, Enterprise expansion and deeper Mechanics Lab work remain later directions.
Pitching, Hitting and Team describe the product direction. Final names may change. No launch dates are announced.
Inside the design process
Earlier Explorer sketches
These early Explorer design studies show the thinking behind asking a question of saved pitching history, then returning to it. They are concept illustrations with synthetic content, not current app screenshots or scientific validation. For the current workflow, see the Motion tutorial.
See the current app workflow →
Storage and privacy
Your pitching record, on your iPhone.
No account is required. Pitch videos, optional Athlete Profile details, notes, context, analysis, References and Saved Comparisons are stored locally. Apple Vision performs pose analysis on the device.
There is no app-owned advertising, tracking or analytics SDK, and no Asymmetri-operated upload or cloud-sync system for your local pitch records.
Photos copies, iCloud, device backups and sharing follow the services and settings you use. You choose when to save or share annotated evidence; those separate copies have their own handling.
Read the Privacy PolicyAt the next practice
There’s more to a pitch than a measurement.
- Pitchers
- See your work more clearly.
- Coaches
- Inspect the evidence. Bring your judgment.
- Parents
- Find context to support development alongside a coach.
Motion v1.2 is in private TestFlight testing. Public App Store availability is still pending.
iPhone · iOS 17+ · Invitation required
Opens Google Forms. Invitations depend on beta availability.