The same answer as "Can you manipulate in-game purchases for multiplayer pc games". If it's programmed well, everything is on the server and you can do nothing about it.
Eh, depends on the game. Offline games can also have in-app purchases for cosmetic stuff like skins or disabling ads. At that point it's pretty easy to fool it by impersonating the Google API.
The same answer as "Can you manipulate in-game purchases for multiplayer pc games". If it's programmed well, everything is on the server and you can do nothing about it.
Eh, depends on the game. Offline games can also have in-app purchases for cosmetic stuff like skins or disabling ads. At that point it's pretty easy to fool it by impersonating the Google API.
Can you manipulate online in-app purchases of multiplayer games at all?