No, you do not need a PC for this because the game is already hacked and modified to run on Android phones only, so there is no point in using a PC for it. A PC is just needed to create modded APKs of original Android games and apps. If you are planning to buy a new Android phone, then check which one supports custom app installation first, then go ahead and buy that one.
For example, maybe the HTC One M8 can support custom app installation but the Samsung Galaxy S4 does not support it, so always look out if your phone can support modding or not before buying a new phone.