This app (Free - no IAP) is for astronomers that can be attached to a telescope.
Question Ranking
Pros
Pro Easy search function
When a planet or star is searched, a guiding arrow appears that directs the user to the correct location.
Pro Important data is clearly displayed
This app always displays altitude and azimuth data in large clear numbers.
Pro Frequent updates
SkEye is known for having periodic updates that expand this app's capabilities.
Pro Works without GPS
Most star trackers rely on GPS for important location information. If GPS isn't available, the user can enter longitude, latitude, and elevation automatically.
Pro Connects directly to telescope
SkEye is capable of hooking directly to a telescope through the optical tube assembly. Once SkEye is connected, it assists users in finding specific stars or celestial bodies.
Cons
Con Unreliable search function
When searching for specific stars or celestial bodies, SkEye doesn't always bring back the intended results.
Con Doesn't work well directly above the user
At the zenith (highest point in the sky), this app's navigation stops working correctly.