A system for scoring shooting sports includes an adapter that attaches an optical device to a mobile computer programmed to support scoring, analysis, and coaching. The mobile computer includes an image detector to sample images of a target, the images including pre-launch image data sampled before a projectile is launched at the target and post-launch image data sampled after the projectile is launched at the target. The system includes an accelerometer to detect projectile launches and thus distinguish pre-launch and post-launch image data. The mobile computer compares the pre-launch image data and the post-launch image data to locate a point of impact of the projectile on the target. A user interface on the mobile computer indicates the point of impact to the shooter.