These are free or available for a small fee apps for hand held devices.
Displays a compass to assist with finding north.
Find the International Space Station
ISS Detector Free
Android Platform app for finding the International Space Station
Sky and Telescope app showing the position of the four Galilean satellites and Great Red Spot Transits.
Shows the named features on the surface of Mars.
Meteor Shower Calendar
Gives dates for various meteor showers.
Moon phase with rising and setting times.
Shows named features on the surface of the Moon.
Shows the night sky with constellations marked and locations of the planets, Sun and Moon.
Shows positions of satellites on a constellation background.
Sky and Telescope app showing the positions of Saturn moons.
Sky and Telescope’s Daily Update.
Complete planetarium program. Advanced versions will allow you to store observing lists and control your GOTO Telescope.
Complete planetarium program.