Apps like AnchorSentinel

Here are some great alternatives to AnchorSentinel by Paul Lutus :
Anchor Alert
Anchor Alert
★3.8
safeAnchor Anchor Watch Alarm
safeAnchor Anchor Watch Alarm
★4.3
SailDroid
SailDroid
★4.5
Anchor Alarm
Anchor Alarm
★4.6
Social Anchor Alarm
Social Anchor Alarm
★5.0
Anchor Alarm - SailGrib AA
Anchor Alarm - SailGrib AA
★4.0
Marine Navigation
Marine Navigation
★3.7
Wavve Boating: Marine Boat GPS
Wavve Boating: Marine Boat GPS
★4.5
Anchor Watch / Alarm
Anchor Watch / Alarm
★4.8
SailFreeGPS
SailFreeGPS
★4.6
Aqua Map Boating
Aqua Map Boating
★3.3
Boatspeed
Boatspeed
★4.2
Digital Compass - GPS Compass
Digital Compass - GPS Compass
★4.1
Portview
Portview
★4.6
AquaVue
AquaVue
★3.4
Positional GPS, Compass, Solar
Positional GPS, Compass, Solar
★4.5