Best SkyDog GPS alternatives: apps like SkyDog GPS

Safety Anchor Alarm

Anchor Watch & Drag Alert

Free

This app monitors your boat's position via GPS and alerts you if the anchor slips, even with a locked screen. Developed by sailors and tested in real anchorages, it provides reliable background monitoring and smart GPS verification to minimize false alarms. It also includes tools for calculating anchor chain length and visualizing your swing radius.

Hip Charts

NOAA ENC Charts

Free

Access NOAA nautical charts for free on your mobile devices. View charts online and download single areas for offline use. Additional features like multiple offline downloads and custom boundaries require a purchase.

Celestial Navigator

by Omar reis

Free

This app assists with celestial navigation training by providing a perpetual almanac, star finder chart with animation, and tools for calculating lines of position and meridian passages. It can utilize device sensors for real-time chart positioning, though a marine sextant is still required for actual navigation.

Marine Radar

by 株式会社フルノソフテック

Free

View and control radar images from a compatible wireless radar sensor on your iOS device. This app aids in navigation by displaying radar data, but is not a substitute for fundamental navigation skills.

Marine Navigation Lite

Offline GPS tracker for boat

Free

This app offers offline GPS charting for marine use, allowing users to own their maps permanently. It provides advanced navigation tools, custom map creation from any image, and respects user privacy by not tracking or selling data.

SEAiq Pilot

#1 App for Pro Marine Pilots

Free

This navigation app provides advanced charting and real-time vessel data for professional marine pilots. It supports various chart formats and external NMEA/AIS devices, offering features like predicted vessel display and docking aids. A free trial is available, with an in-app purchase for permanent access.