Gobius vs Nauti

This app is designed to be used with the Gobius C and Gobius Pro sensors. The sensor is measuring sleeplessly from empty to full tank for all kinds of fluids. It gives you to volume in % and liters. 
The sensor is placed direct on top of the tank on plastic and glass fiber tanks. On metal tanks, you need a hole, at least 40 mm.
Gobius C is ready to use; everything is in the box. You get the sensor with a 3M tape, a Quick Guide, 3M tissue, a cable to connect to a power source (12-24 V), and to use for external devices, like warning lights/buzzers, control systems, and analog gauges. The Quick Guide gives you a brief overview of installing the sensor. And the sensor is waterproof IP66. In the app you have everything; Installation Guide with instructions for mounting the sensor on the tank, setup/calculation and displaying the fluid level in different colors. The app has also a Tank Calculator for non-rectangular tanks, such as round and triangular tanks. Installation should take no longer than 15 minutes

Nauti-Control connects your boat's instruments and autopilot to your iPhone, iPad and Apple Watch, wirelessly. It works with a Nauti-Control controller on your SeaTalk1 or NMEA 2000 network. Steer your autopilot along a route • Drop waypoints on the chart, or import waypoints and routes as GPX from your plotter or planning software • Go To a single mark, or Follow a route leg by leg • Your pilot steers the active leg in Track mode • When the pilot asks "Turn to waypoint?", accept it on your phone or your Apple Watch • See your leg, distance and bearing to the mark, cross-track error and time to go Autopilot control • Auto, Standby, Wind and Track, course changes and tacks from your phone or watch • Shows the mode and heading your pilot actually reports Live instruments • Depth, speed, wind, heading and more on a dashboard you arrange yourself • Graphs, wind rose and compass widgets Connect your way • Bluetooth, or Wi-Fi on the boat's network • Keep your controller's firmware up to date from the app Tested with Raymarine Evolution and SeaTalk1 tillerpilots, B&G, Garmin Reactor and Simrad TP22/TP32 autopilots. Nauti-Control is a supplementary autopilot control and is not for navigation. Use it alongside your chartplotter and a proper lookout. Requires a Nauti-Control controller: nauti-control.com