Privacy
Primo TRAP Finder is a field walk list that stays on your device. There is no account and no tracking.
Location
The Here button asks for your location only while you are using the app, so the map can show where you are standing. That fix is drawn on the map and is not uploaded, sold, or stored as an account profile.
Map tiles
When you pan the map, the app requests map pictures from public tile services, including USGS The National Map. Those services see the usual request for a map tile. The ranked trap list itself is bundled in the app.
Walk list
Sharing a GPX file uses the iPhone share sheet. The file goes where you send it.
Primo Pro
Subscriptions are billed by Apple to your Apple ID. This site does not collect a card number. Monthly is $4.99 and yearly is $29.99, each after a 7-day trial.
What this is not
Not ore. Not a mining claim. Not legal, land-access, or safety advice. Killed areas are shown so you can see why they are off limits.