Sign collection · iOS
The signs
worth keeping.
Take a photo of a sign — any sign. Loot Marker cuts it out, straightens it, and files it into your collection. What you notice becomes a scrapbook, not a camera roll.
The app
Point, tap, and it's yours.
Every shot is auto-detected, straightened, and dropped into the collection you're working on. Swipe through a few captures from the field.
Auto Detect — the sign is isolated and the shape classified before you've lowered the phone.
The gap
A camera roll isn't a collection.
Photo apps see rectangles. They don't know a stop sign is an octagon, or that a yield sign is upside-down on purpose. So the crop is wrong, the perspective is wrong, and the sign lives in a scroll that no one ever opens twice.
Camera roll
Rectangular thumbs · wonky angles · buried in dates · no shape memory · every photo re-forgets what you were collecting.
Loot Marker
Shape-aware detection · one-tap flatten · sorted by collection · filed with place, tag, and theme · designed for revisiting.
The difference
The app knows what a sign is. Every capture is treated as an artifact, not a snapshot — cut clean, laid flat, and kept.
What it does
Four things, well.
One button in the field. Underneath, an on-device pipeline that treats a sign like a specimen: detected, straightened, catalogued, and displayed like you mean it.
Auto detect the shape
A CoreML segmentation model isolates the sign; OpenCV traces its edges. Rectangle, diamond, circle, triangle, pentagon — hinted by what you picked, corrected against what it sees.
Straighten the perspective
Four corners, one filter. A diamond leaning off a pole comes back upright, a highway shield keystoned by angle comes back square. No dragging handles, no re-crops.
File it in a collection
Folders by theme (Trail, Highway, NPS, Vintage…), tags for the fine grain, place and date carried from the shot. Later you search by shape or by trip.
Display it like you mean it
Card themes — Classic, Trading Card, Holo, Vintage Postcard, Polaroid. A canvas mode to lay a whole trip out. The archive is the interface.
How it works
One shot. One second. Kept.
Frame the sign. The camera captures at full resolution while a small salient-object model runs on the Neural Engine. OpenCV traces the mask, classifies the shape, hands four corners to a perspective filter. What comes back is a straight, tight, transparent-cornered image with the shape kind attached. Nothing leaves the phone.
Your data
Everything stays on this phone.
Detection runs on-device with a bundled CoreML model — no server ever sees your photos. iCloud sync is optional and end-to-end encrypted through your account. No analytics, no ads, no sign-in. Export a backup file any time you want to move phones or archive a season.
Download
Free to start. Premium when you outgrow thirty.
Loot Marker is free for the first thirty signs — enough for a trip. A one-time unlock removes the limit and turns on canvas mode, every card theme, and custom labels.
Free core · $4.99 one-time unlock