I had two simple Requirements to a Anchor Alarm App:

1. The adjustable swing arc should assume every possible shape, as the maximum distance could be different to each direction.
2. I would like to wake up even if I sleep like a log. Also in case of other problems like poor GPS accuracy or power supply drain.

I'm convinced, with this App your anchor watch will be improved in many ways!

For sure you know the problem after you set the anchor successfully, you would like to set an Anchor Alarm for your anchor-watch, but later at night the wind shifts from East to West, and exactly in West there is a nasty shoal. Well, with Anchor Alarm you've the ability to set your swing shape in advance as individually as specific for each situation!

All feature at a glance:
§ Individual shapes instead of a fix swing arc
§ Alarm sound which will wake you
§ Ship dimensions in true-to-scale representation in the map
§ Optional alarm on low battery or other power supply issues
§ Optional alarm on poor GPS accuracy
§ Optional alarm on low volume / silent mode
§ Optional alarm if headset is connected
§ All alarms are active in the background and even if you lock your iPhone.

Apple Disclaimer
Continued use of GPS running in the background can dramatically decrease battery life. So please do not forget your 12V charger ;-)

What’s New

Version 1.14

Several adjustments under the hood to support iOS13 capabilities!
Support of Dark Mode as well as bug fixing of non visible drawings in map since iOS 13.2.
The previous version runs stable up to iOS 12, therefore it became necessary to upgrade to iOS13 for this and future updates.

Ratings and Reviews

3.3 out of 5
7 Ratings

7 Ratings

Buyerguy ,

Great app

We anchor in a lake overnights and depend on a reliable anchor alarm. I’ve tried many apps but this is the app I use. The alarm is wicked loud and wakes me up (heavy sleeper). Great ability to draw a custom alarm circle and also alarm on phone conditions which might cause the app to not be able to do its job. Love the app, thank you for the development work.

Top Don ,

Does not work.,

Alarm goes off when not even moving.

Developer Response ,

Well, the alarm rings as soon as you cross the line of the area you defined in my app. Please test it on land, you will see the error is with you, not with the app.


Florian Kriesche
25.3 MB

Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, German

Age Rating
This app may use your location even when it isn't open, which can decrease battery life.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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