3ball: Carom Trainer

Turn real three-cushion and three-ball carom positions into repeatable practice. Set the balls by touch, align a position from a table photo, or open a saved setup. The photo assistant uses classical on-device image analysis and always leaves the corners and balls editable; photos are not uploaded. Use the 3D and top views to adjust angle, spin and power. See the calculated route, object-ball contact point and cushion sequence, then replay the shot. The computational solver samples possible shots with the same physics engine; it does not generate advice. Calculated routes are model estimates, not guaranteed results on a real table. Build drills, review history and statistics, save positions, and share compact 3ball.app links. No account or sign-in is required. Your positions, history and settings stay on this device unless you explicitly share or export them. If you choose to send feedback, your message, display nickname, technical context and any photos you attach are sent to our support service. This is separate from on-device photo alignment. In this first release, all simulator features are available without ads, purchases, an account or sign-in. An internet connection is required when the app starts and whenever you begin a new session; a shot already in progress can finish if the connection drops.