Best 1st alternatives: apps like 1st-Mate

Cortex Onboard

Cortex on your mobile device

Free

This app allows you to configure and update your marine electronics from your mobile device. Monitor vessel data, receive alerts, and manage features like Anchor Watch from anywhere on board.

Ditch: Boat Navigation

Marine GPS, Boat Charts, Maps

Free

Enhance your boating experience with intelligent routing and accurate arrival time predictions. Visualize historical vessel traffic and customize charts for a personalized view of waterways, ensuring safer and more confident journeys on the water.

Simrad: Companion for Boaters

Great nautical charts

Free

This app provides boaters with detailed nautical charts, weather forecasts, and route planning tools. It offers GPS navigation, track recording, and points of interest, with premium features like offline maps and advanced charting available through subscription.

WakeWatch

by Daniel Munson

$1.99

This app provides crucial boating information, including no-wake zones, speed limits, and bridge schedules. It uses GPS to alert you to upcoming hazards and features NOAA charts as a base map for enhanced navigation.

Rhodan

Trolling motor remote

Free

Transform your iPhone into a remote control for your trolling motor. Monitor real-time performance data and adjust motor settings wirelessly for a seamless fishing experience.

RT-Nav

by Hilton's Fishing Charts, L.L.C.

Free

Navigate using real-time oceanographic data like sea surface temperatures and currents on your mobile device. Create and edit waypoints, zoom maps, and track your GPS location for point-to-point navigation. Access dynamic maps even without cell service.

Sea Depth

Offshore Bathymetry Charts

Free

Visualize detailed underwater terrain with high-resolution bathymetric charts. Gain deeper insights into seafloor structure, contours, and terrain for offshore activities. Includes optional data overlays and waypoint management for enhanced situational awareness.