Privacy
Spothole collects no data about you on a permanent basis. All spots and alerts are "timed out" and deleted from the system after a set interval, which by default is one hour for spots and one week for alerts.
Settings you select from Spothole's menus are sent to the server, in order to provide the data with the requested filters. They are also stored in your browser's local storage, so that your preferences are remembered between sessions.
The data you provide can optionally include your login credentials for QRZ.com and HamQTH. You can provide these in the "Your Data" menu of most pages. If you do, Spothole will augment the data it produces with lookups from these services, which can for example provide more accurate markers on the map tab, and operator names when you mouse over a DX callsign. Spothole will still work fine if you don't provide these. The values you enter are sent to Spothole via HTTPS so are protected in transit, though of course you do have to trust Spothole with this sensitive data in order to use this feature.
Any data you send as part of a query, such as your QRZ or HamQTH credentials, is used only for the lifetime of that query and is not saved anywhere apart from your own device.
Spothole uses no trackers, no ads, and no cookies.
Spothole is open source, so you can audit the code if you like.