Ever wondered exactly when it truly gets dark? While sunset times are easy to find, it's harder to know how long you’ll have natural light before reaching for your flashlight. LunaSolCal is one of the apps that can provide you this information and I chose it over the other similar apps because it can be configured to display the civil twilight period in a simple widget on my Android phone:
Funded by the US National Science Foundation, implemented at the University of Minnesota, the "Flyover Country" mobile app is a very useful, unique and free app for Android and iOS, which enriches the exploration experience using offline maps whether you're flying, travelling by car, or trekking through nature's wonders. It is voted one of the best science apps available today by Popular Mechanic.
