Ever since, Apple has confirmed that they do slow down their iPhone to increase battery life. The internet buzz is: Does Android users face same problem?
The Answer to this is both Yes and No. Well lets go with the latter first. All most all Android phone makers do not slow down their Smartphones in order to save their battery. But their smartphones do get slow with time because of latest updates and no priority for UI(User Interference Processes). Unlike iOS, Android updates demand more resources like CPU and Ram Power and the UI of Android systems does not have a priority over other processes.
All together, both operating systems slow down their respective smartphones for their respective reasons but iOS operating systems users still have a slice to enjoy as recently apple has announced they would give users the option to implement battery saving option or not.