1 · Place the phone

Side view (recommended): phone on the ground or a tripod about 1.2–2 m in front of you (facing your chest), lens at ball height, landscape, pointing straight at the ball. The ball should sit in the left third of the picture if the target is to the right.

Down the line: phone 1.5–2.5 m behind the ball on the target line, lens low. Gives the start direction (left/right) better, speed less exact.

2 · Calibrate

Open 📷 Swing, drag the circle over the ball, and set the camera-to-ball distance. Tap Detect ball. The ball's real size (42.67 mm) sets the scale, so no tape measure is needed for side view. The circle turns green and the app is armed.

3 · Hit

Swing normally. When the ball leaves the circle the app saves the swing, tracks the ball in the first frames and shows a slow-motion replay with the track. Tap Fly it to send it down the course.

Tips

• Bright daylight = short exposure = sharp ball. Avoid a white background behind the ball.
• Most phones give 30–60 fps in apps. For better numbers, record with the phone's slow-motion mode and use 🎞 Video.
• If detection fails, use 🎚 Manual.
• Use a practice net or foam balls indoors!