EFBs are feature-rich, easy to use and replace numerous paper documents such as ICAO charts or the VFR manual. These planning and navigation programs make it possible to plan a flight with just a few clicks, including fuel calculation, weight and balance calculation, weather and NOTAMS. During the flight, these digital aids guide you along the planned route thanks to GPS and provide the cockpit crew with appropriate airspace and terrain warnings. Even collision warning devices can be integrated, which display air traffic visually and also warn the pilot acoustically.

There is no doubt that these digital aids support pilots in both planning and in-flight navigation, especially when flying in foreign countries. However, studies and research reports also show limitations and risks that need to be known and taken into account.

To read further:  
https://staysafe.aero/en/fliegen-mit-digitalen-helfern-vorsicht-vor-unsichtbaren-risiken/