Anchor Sentry 4+

Michael Dieter Konz

    • 3.0 • 2 Ratings
    • $3.99



Anchor Sentry is an app to monitor the ship's position at anchor and inform the skipper when the anchor is dragging and thus the ship leaves the setup perimeter.

- Show current position on GoogleMaps map or Navionics map (To gain
access to Navionics maps from this application, users with an active Navionics
subscription in the Navionics Boating application must register with their Navionics
- Distance circles to help finding a good anchor position
- Drop anchor by tapping on map or by position or by bearing and distance
- Can be used for anchoring with shore lines by watching the heading rather than the position
- Tracks can be saves as GPX file for later processing
- Option to set up prohibited zones which will trigger an alert when entered. These can be used indepent of the anchor state
- Runs in the background even while other apps are used
- Unique sync functionality which allows to pair two or more devices together to see the ships position even while out to shore for dinner
- Barograph function included
- Display real echo sounder data from a providing NMEA server
- Optional compass overlay to help finding the bearing to the anchor
- Option to show current position visible to friends and family on the Anchor Sentry website
- Proximity alert between ships both using Anchor Sentry. To get warned when your neighbours anchor is dragging.
- Automatic anchoring feature
- Display maximum swinging circle
- Save favorite anchoring places with pictures
- Several setup options to customize your app

What’s New

Version 2.8

- Compass reading of the device is not correctly shown in top right corner of the map.
- Boat vector while moving is now also displayed on the Navionics map.
- Improved the user feedback when downloading Navionics maps for offline use.
- Navionics maps now recognize the selected unit (feet or meter) for displaying depths.
- Navionics user can now set some chart options like in the Boating App. For this the "Navionics login" entry in the settings has been replaced with a "Navionics settings" entry. The former "Navionics login" you will find within the new settings page.
- Auto anchoring now uses the NMEA heading if available.
- Added the device distance from bow to the ship data settings. This is the same value as in the auto anchoring settings. If enabled in the ship data settings this distance will used to adjust the anchoring position when droping the anchor as well as the alert radius.

Ratings and Reviews

3.0 out of 5
2 Ratings

2 Ratings

CGamesPlay ,

Mostly works

After using for about a week, I had a false alarm one night. No big deal, make the radius a little bigger and go back to sleep. Except due to some bug the alarm would not shut off. Make the radius huge, turn off the alarm button, nothing worked. So I force quit and reopened the app. Apparently the app doesn’t save your anchor position or track data, so now I have no idea if I’m actually dragging. The bug is unfortunate but tolerable, but throwing away my anchor position completely makes the app worthless in the middle of the night.

Only supports metric, so you have to convert in your head if you use feet.

Developer Response ,

You can specify in the settings if you want to keep anchoring position and track. The default value is no. Given you comment I will change this to yes.

Seacap8 ,

A bit buggy

Have used this app for a couple of years. For some reason it has gotten buggy. Looses track of where I drop. Plus it has position lines zooming out of anchor circle all over the place.

Developer Response ,

Erratic lines all over the space are an indication that there is a problem with the GPS signal. This can have many reasons, none of them the app can anything do about. GPS is a radio signal and as such can be disturbed. Even having the device resting close to a desktop computer can disturb GPS reception.

App Privacy

The developer, Michael Dieter Konz, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Location
  • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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