A fully functional anchor alarm designed for iPhone & iPad.  - Simple and reliable with user selectable units, drift warning and low battery alarms.  - Pause the alarm and take your device with you; simply continue drift monitoring when you return.  - Set the anchor at the current location or a bearing & distance to the anchor. - Use Anchor Basic to remotely monitor Anchor Plus. Go ashore for dinner and monitor your friends Anchor Plus alarm using Anchor Basic. - If you like this free version, try Anchor Plus with a host of additional features