Replay Notebook: Tennis Video

Film it, line it up, see what changed. Replay Notebook puts two of your own tennis clips on one timeline so you can step through a serve or a forehand at the real recorded frames, mark what you notice and walk into the next session with one clear thing to work on. You make the call on your technique. The app never scores you. LINE UP TWO ATTEMPTS • Record a new attempt with the rear camera, or bring in a clip you shot earlier through the Photos picker or the Files app. • In each clip, choose the moment you care about, such as the toss, the contact or the split step, and both clips play on together from there. • Watch them next to each other, stacked, or flip between A and B. • You set the alignment by hand. Neither swing is sped up or slowed down to match the other. STUDY THE DETAIL • Drop to half or quarter speed, loop a stretch and step one recorded frame at a time. • On a paused…