Film a session
Put your iPhone on a stand, tap Start session, and play. Kinograph Tennis keeps the points and cuts the time between them. Pause stops filming without ending the session, and Finish ends it.
Trim a video you already have
Tap Trim, then Choose from Photos or Choose from Files. Kinograph keeps the points and throws away the waiting between them. Save the result to Photos or Files, share it, or replace the original in Photos; Photos keeps the original underneath, so you can revert to it.
Save your points
When you finish a session, choose One video for every point in a row, or One per point. Then tap Save to save to Photos or Files, or to share.
What you need
An iPhone, and a stand to put it on. Kinograph Tennis asks for the camera, the microphone, and Photos. See Permissions.