Sleep soundly and don’t worry about your anchor dragging with the easiest-to-use anchor alarm app. Mark where you drop the anchor and turn on the alarm once it’s set. The anchor position and drift radius are recorded using your current GPS position.
I don't own a boat (or an iPhone) but if I did I'd use this. Working on a similar, but completely unrelated, location alarm project. Excited to see projects like this 👍
Anchor Time
PlanetScale Boost