Question Ranking
Pros
Pro View stars from a different time period or place on earth
Star Chart lets users see the sky as it was 10,000 years ago, or as it will be in 10,000 years. It also lets people see what the sky would look like from a different place on earth .
Pro Perfectly looking on screen!
It is fun to stargaze :)
Pro Provides useful information
Star Chart comes with the Messier Deep Sky catalog which contains information about galaxies, nebulas, and star clusters.
Cons
Con Limited Data information
Limited information about listed objects.
Con Lots of information is blocked by in app purchases
Instead of offering everything for a flat rate, every additional feature is offered at anywhere from $2.99 to $9.99.
Con High on energy
Unfortunately, uses a lot of battery.
Con Limited "search" function
Instead of doing global search in between all object sets, you have to choose up front the set to be searched (stars, constellations, etc.) - which is inconvenient if you do not know to which set the object belongs (i.e. is it a star, a planet, a comet, etc.).