Group Analyser

A photo-based shot-group measurer. Photograph your target, mark the shots, and get the group’s size and statistics. No ruler at the bench.

Reached from Group Analyser (drawer → Saved Sessions & Targets), which lists every group you have saved; + New starts another one.

Flow

1. Setup (optional): link the group to a profile, location/target and load, so the analysis is filed against the right kit.
2. Photo: take or choose a photo of the target.
3. Crop: frame the target area.
4. RefPts: set the real-world scale from a known reference length on the target (e.g. a grid square or the target’s printed size).
5. Aim: mark the point of aim.
6. Impacts: tap each shot hole.
7. Result: group statistics and a scatter view of the shots.

Output

• Group size (extreme spread), mean radius/SD statistics, and the shot positions relative to the point of aim.
• Export image: share a rendered card of the group via the share sheet.
• Saved groups can be reopened from the Group Analyser list, and feed the Group Analysis widget.

Notes

• Shots are placed by hand: tap, then drag to fine-tune. Accurate scaling matters more than a perfectly square photo.