HomeAppsProductivityAnchorSentinelApps like AnchorSentinel Here are some great alternatives to AnchorSentinel by Paul Lutus : Anchor Watch Pro / Alarm ★4.7 Anchor Alert ★4.1 safeAnchor Anchor Watch Alarm ★4.3 Anchor Alarm ★4.6 Marine Navigation ★3.6 Social Anchor Alarm ★5.0 Anchor Alarm - SailGrib AA ★4.0 Marine Navigation Lite ★3.3 Anchor Watch / Alarm ★4.6 SailFreeGPS ★4.7 Aqua Map Boating ★3.4 WatchMate ★3.3 Boatspeed ★4.1 Wavve Boating: Marine Boat GPS ★4.4 Digital Compass - GPS Compass ★4.2 PortView ★4.6