Know exactly how good that group was.
RoundKeep Zero measures your shot groups from a single photo. Take a picture of your target and get group size in inches. Print a RoundKeep target and it sets its own scale for you.
It's a standalone app that does one thing well: target analysis and group stats. Point it at a target and shoot.
Free on Google Play. iOS may follow.
Print-and-go targets
Targets that measure themselves
Every RoundKeep target has corner markers. The app finds them in your photo and reads the exact scale straight from them, so your group measures right even when the shot was taken at an angle.
The library covers the staples: Bullseye, Pistol Bull, the 5×5 and Bill drills, Mozambique, Dot Torture, Plate Rack, and more. Print at 100% scale and the built-in ruler confirms the size is right. Already have a target you like? Zero handles those too; you just set the scale once by hand.
Editing detections
Correct anything by hand
Detection runs on your phone, on a model trained on real target photos. When shadows or lighting throw it off, you fix it in seconds: tap to add a hole, tap one to delete, drag to nudge it, pinch to zoom.
Grouping shots is just as quick. Draw a loop around a cluster and assign the whole batch at once. Sizes update as you go, and the photo never leaves your phone.
Measure your next group
RoundKeep Zero is free on Google Play. Measuring is always free; a one-time Pro upgrade unlocks unlimited saved targets, full stats history, and clean exports.