When I first downloaded "Starmap" from French Publisher Star-map, I was somewhat disappointed. The star charts were accurate of course, but panning around was clunky, with a low refresh rate. As the author explains in his FAQ:
"The refresh rate of the sky map is about 3 frames per seconds when you slide it with your finger. For each frame, star positions and projections are computed. I have chosen not to use the hardware accelerated open GL as the sky view requires a lot of text and very smooth objects. Indeed, a view contains many information, and the readability needs high quality graphics. I choose this option as I prefered to have a good map under the eyes while observing than a fast sliding sky map without antialiasing and texts. Nevertheless a full graphics accelerated version will be released before the end of they year."
Nevertheless, I finally got the app up and working this morning at 5.25 AM, and set my sights on Orion. Using the star charts, I was easily able to locate Sirius just below Orion's feet: Victory! I also looked for planets -- but as StarMap informed me, only Uranus was currently visible, and I didnt't have access to a telescope...
Beside the clunkiness, the program crashed on me several times, which is par for the course this early in the game. A "pro" version of this app is due later on this year, according to the web site; hopefully this solves the panning problems and improves the overall stability.