Triatlas!

The Triatlas app contains the most detailed, speedy star chart available for smartphones and tablets - Stars up to mag 12.6- Galaxies up to mag 15.5 (PGC). 37000 in total - 1200 planetary nebulae- 1800 open clusters, all globulars- Others: SH-2, RCW,LDN / Barnard - Double stars whose main star is brighter than 11th magnitude (35,000 double stars)- Variable stars whose maximum reaches the 12.5 magnitude (29,000 variable stars)PLUS:- Flexible Night vision mode- Landscape-portrait mode- Flip and mirror (Supporting telescope orientation)- Chart-to-chart navigation using the black corners. Used with permission.