Well i wouldn't say any program i mention here is the best or worst. You know it depends more on people's preference.
Almost everyone i know has installed Photoshop in their device[of course pirated] So it would be easily available to you. You might gove it a shot.
Most people tend to use adobe's Photoshop for most of the things.But i belive photo shop might be better for photo manipulating purpose.
If you just want to tweak exposure contrast brightness and shit or filters you better go for something like lightroom.
Have a good day.