This is a Anchor Watch application, it is very easy to use, you can simply active the app after you have dropped your anchor and prepared the boat. You don't have to know the exact coordinates of the anchor, you only need the bearing and the distance to your anchor, thats all.

This is the ad free version of the Anchor Watch (free) app

+ Background task support, alarm is still active when you use other apps
+ Drop anchor and adjust alarm easily via drag & drop
+ Set advanced drift radius, very useful when there are many boats on the anchorage or you anchoring between mooring boys
+ Fully offline, doesn't need a internet connection
+ Display of the OpenSeaMap data http://www.openseamap.org/ (Copyright: http://www.openstreetmap.org/copyright/), this is completely optional and also possible without internet connection. For usage of the map in offline mode, please see: https://drive.google.com/file/d/0BwM5wbp9dvnbQzhmWnNlOFhZLWM/view.
+ Configurable measure units: Metric, nautical miles, feet
+ Possibility to rotate map according to the device compass

Permission used:
+ Fine GPS location: To monitor your location
+ Wake lock: To wake up phone during alarm
+ Vibrate: For the alarm
+ Full internet access: For displaying the OpenSeaMap data
+ Network state: For displaying the OpenSeaMap data
+ Read and write external storage: For offline map availability and map data caching

In case you have any problems do not hesitate to contact me

Disclaimer

Liability for damages
The use of our application at your own risk. We accept no liability for damages.