What’s on the smartphone agenda for May?

Done

Your very own and personal habit tracker. Done helps users create healthy routines and break bad ones by helping you set goals, track your progress and motivate yourself with streaks and chains. Set your daily, monthly, weekly and yearly goals. The app will track streaks for each of them, developing a chain. A circle means the goal has been completed, an X marks a missed goal on the calendar. You can view your longest streak and the number of goals you’ve accomplished. View your overall performance on the graph, where you can see where you’re progressing and where you’re lacking and what you need to work on. You can also export the data to a CSV file to analyse outside the app, and you can apply either Sunday or Monday as the start of your week.

Stellarium Mobile Star Map

This one’s for the astronomy buffs out there. Stellarium is a mobile 3D sky map or a free open-source planetarium. Point your phone at the sky to identify stars, constellations, planets, comets and satellites in real time. You can zoom in on moons, galaxies and constellations, and switch to Night Vision mode for the best outdoor stargazing experience. Click on constellations and other objects to learn more about each one, including the coordinates, the hour angles and a short description or history.