Granum
Shotgun pattern analysis
Turn your pattern board into real numbers.
Photograph your pattern after each session. Granum measures the spread, counts the pellets, and records it all against the gun, choke, and load you used.
Free to download · iOS & Android · No account needed
Scenario planner PRO
See what your pattern covers before you shoot the stage
Lay out the stage at real-world scale and drop your calibrated pattern on top. Granum shows exactly what your spread and scatter zones hit at that distance, so you know what to expect before you step up to the line.
- Paper targets, plates, and poppers at true size, or any custom size
- Overlay a single pattern or the average of a whole pattern group
- Measure between any two points, and add a holo sight reticle sized in MOA
- Share a scenario as a link - the layout lives in the link itself, nothing is uploaded
How it works
- 1
Photograph the board
Snap your pattern board at the range, or import a photo later.
- 2
Calibrate and mark
Trace a reference line for real-world scale, then place the spread and scatter circles.
- 3
Get the numbers
Pellet detection counts the hits. Spread, scatter, and pellet counts are saved against your gun, choke, and load.
Every session, searchable
Every pattern and field note in one list. Filter by distance, gun, choke, ammunition, weather, date, or rating, and compare results across setups over time.
Pick the right choke PRO
Enter a distance and the spread you want, and the choke calculator ranks every choke by how well it matches. Your own recorded patterns take priority over generic estimates.
And more
Equipment log
Guns, chokes, and loads in full detail - down to wads, primers, lot numbers, and cost per box.
Field notes
No time for a full analysis? Record choke, distance, and observed spread in seconds.
Share cards
Share any pattern as a clean image with rings, centre of impact, and key metrics.
Choke comparison PRO
Compare chokes side by side, filtered by gun and ammunition, at your distance.
Pattern groups PRO
Group patterns shot with the same setup and compare averaged results instead of single shots.
Shell plans PRO
Plan your rig shell by shell, or let the loading-order calculator work it out for you.
Free to use
Photographing, analysing, and logging your patterns is free. Granum Pro unlocks the planning tools marked PRO, plus automatic cloud backup.
Your data stays yours
No account and no ads. Your patterns and photos stay on your device unless you turn on cloud backup, and crash reporting can be switched off.
Bring it to your next range day
Free on iOS and Android.