Granum

Granum

Shotgun pattern analysis

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Free
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Details

  • Released
  • Updated
  • August 12, 2026
  • September 18, 2026

Features

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About

Granum is a shotgun patterning companion for clay and field shooters. Photograph your pattern board after each session and Granum turns it into calibrated, comparable data - pellet counts, spread diameters, equipment records, and choke recommendations. PATTERN ANALYSIS Draw two concentric circles on your photo to define the main spread and scatter zones, then calibrate to real-world size by tracing a reference line. Every result is stored against the gun, choke, and load you were using, in millimetres or inches. The enhancement pipeline crops, lifts contrast on faded cardboard, and tunes detection sensitivity first. Pellet detection then finds the impacts automatically. EQUIPMENT Log every gun, choke, and ammunition load in full detail - barrel and stock specs, chamber sizes, choke constriction, powder charges, wads, hulls, primers, lot numbers, and cost per box. Reloads get their own section, and any item can carry photos. CHOKE CALCULATOR (PRO) Enter a target distance and desired spread, and Granum ranks every choke by predicted match quality. Your own recorded data always takes priority over generic estimates. CHOKE COMPARISON (PRO) Compare pattern performance across chokes in one table, filtered by gun and ammunition, to see which delivers the tightest or most consistent spread at your distance. SPREAD CHART (PRO) An interactive spread-vs-distance curve with your own data overlaid as scatter points. Drag to read exact values at any distance. FIELD NOTES No time for a full analysis? Record choke, distance, and observed spread in seconds. Field notes feed the choke calculator alongside full pattern data. LIBRARY Every pattern and field note in one searchable list, filterable by distance, temperature, location, weather, gun, choke, ammunition, date, and rating, in grid or list view. SCENARIO PLANNER (PRO) Lay out IPSC targets at real-world scale and overlay a calibrated pattern - or an averaged pattern group - to see what your spread and scatter zones actually cover at a given distance. Paper targets, plates, and poppers at any custom size. SHELL PLANS (PRO) Plan your rig before you shoot. Build a shooting order shell by shell, or let the loading-order calculator work it out from your starting load, reload batches, and any special shells. You get a colour-coded, numbered rig grid you can drag to fine-tune, with an optional overfill warning. PATTERN GROUPS (PRO) Group patterns shot with the same setup and compare averaged results instead of single shots. CLOUD BACKUP (PRO) Automatic backup to iCloud after every save, one-tap restore to a new device, and local .granum export for offline archiving. GRANUM PRO Photographing, analysing, and logging your patterns is free. A Granum Pro subscription unlocks the features marked above. Subscriptions renew automatically and can be cancelled at any time in your store account. MORE Share any pattern as a clean image card with rings, a centre-of-impact crosshair, and key metrics. Custom overlay colours throughout. Metric or imperial from a single setting. Crash reporting opt-out - no account required, and no data leaves your device unless you enable cloud backup. Dark and light modes tuned for outdoor readability. Whether you're testing loads for sporting clays, evaluating chokes for a hunting season, or building a long-term ballistic log, Granum gives every range visit a permanent, measurable record. Privacy Policy: https://saentisoft.com/granum/privacy-policy/ Terms of Use (EULA): https://saentisoft.com/granum/eula/
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What's New in Granum

1.15.1

September 18, 2026

SCENARIO • Add a calibrated background photo of a real target array under your overlays and targets - take or choose a photo, crop it, then mark something of known length to calibrate it. • The canvas now works beyond its original edges: pan, drop targets and measure distances anywhere, zoom out further for a wide stage, and a floating button brings everything back into view. • Reach a target hidden under an overlay - tap it again to select what's underneath instead of always grabbing what's on top. Tapping the selected item cycles down through everything stacked there, wrapping back to the top. • One finger on empty canvas now pans the view, and double-tap zooms to the point you tapped. • Snap to grid is now its own toggle, off by default - grid spacing and snap are remembered across sessions. • Target dragging is smoother, and the bottom sheet opens only when you tap a target or overlay, not when you drag one. • Rings reaching past the edge of a board photo no longer leave an empty box inside the overlay. PATTERNS • New patterns preselect your last setup - gun, ammo, choke, target type and distance carry over from your most recent pattern. • Prepare Image is a one-step crop screen: drag the corners and tap Apply crop. • Calibration distance now prefills from the target type or your last calibrated pattern. • Pattern detail highlights and Analysis Results are reworked into a labelled list with info legends. • Tap a pattern's photo, or its magnify button, to zoom and pan it full-screen. When the pattern has been analysed, its spread and scatter rings are drawn over the photo and zoom with it, with a toggle to hide them. • Share card photos fill the frame instead of leaving bars, and group share cards show the cover pattern's own spread and scatter rings. GEAR • Ammunition gets a Load Type picker (Birdshot, Buckshot, Slug) with quick-pick presets for shot size, payload, velocity, wad and crimp. • Choke constriction quick picks (Cyl through XF) fill in the name, and choke type, material and compatible gauges are quick-pick chips. • The choke detail screen shows an Expected Spread card at 20/30/40 m or yd from the Spread Chart model; adjusting it to this choke's own recorded patterns is a Pro feature. • Gear forms now confirm before you leave with unsaved changes. SHELL PLANS • Plan a detachable magazine feed instead of a tube: a chamber round plus magazines of up to 10 shells fire in sequence, and a magazine can be swapped before it runs dry. • Calculator overrides now accept a shot range, like 7-10, instead of one shot at a time. CUSTOMIZATION • Choose which measurements appear in a pattern's or group's highlights strip and share card, independently for each. FIXES • Fixed Pro purchases, restores and entitlement checks failing with an invalid key error - production builds since 1.14.1 shipped a broken subscription key, so buying Pro or restoring past purchases failed for anyone who hadn't already unlocked it. • Fixed a crash when dragging the calibration line or a spread circle on a new analysis. • Fixed pattern density and evenness never being recorded, which left those stats blank on the detail screen and in group averages. • Fixed scenario taps and drags: taps not reliably opening the edit sheet, pinch-zoom and pan fighting each other, distance lines measuring from unrotated bounding boxes, and dragging an overlay opening the target underneath. • Fixed the scenario export ignoring your zoom, the toolbar overflowing on narrow screens, its share actions vanishing while something was selected, and the name field's caret jumping to the start while typing. • Fixed the pattern library losing your sort on Field Notes, the diameter sign not rendering in overlay labels, and 0°C, calm wind or 0% humidity hiding a pattern's conditions. • Fixed a shell plan's rig grid and Shooting Order list drifting apart, and tube reloads of more than 4 shells firing out of order.

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Subscriptions & In-App Purchases

Granum Pro Monthly

Full access to all Pro features, billed monthly

$2.991 Month
7 Days trial
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