Group Lab

Photograph your target at the range, or select existing photos from your phone.
Enter your shooting distance and a size reference, then mark your bullet holes.
Group Lab will calculate your group size in MOA, MRAD, inches and mm.
Set your Point of Aim, and you'll see your accuracy offset in the same units.
Group Lab displays the group radius and centre of group marker.
Each bullet hole is graphed by its distance from the group centre.
Group Lab will even detect potential flyers, and display calculations with and without them.
You can optionally adjust the contrast, brightness, rotation, and crop out the background.
Set your bullet diameter for accurate hole markers and share your results with analysis overlay.

Advanced Target Analysis
• Photograph your target or select existing photos
• Quickly add bullet hole markers
• Fine tune markers with popup magnifier
• Group size calculation - MOA, MRAD, inches, mm
• Set your Point of Aim
• Point of Aim Offset - MOA, MRAD, inches, mm
• Displays group centre and radius
• Graphs bullet holes from group centre
• Detects potential flyers
• Crop and share results with analysis overlay
• Set marker and crosshair styles
• Set text and marker colours
• Adjust contrast, brightness, rotation and crop
• Automatically deskew crooked target photos
• Add location or other notes to each photo

Modern, easy to use interface.
First launch tutorial and detailed help included.
Remembers your last used units - no more units settings pages.
Optionally converts values when units change.
No account required, and no ads.