Board Thread:Questions and Answers/@comment-99.231.200.33-20161024212057/@comment-27247829-20161025040419

In this case, it's FGO's poor optimization. Even amongst iOS users, there are reports of overheating and battery drain (depending on the model), and I won't be surprised even if a 2GB iOS lags whenever you do a certain character's NP.

Like you said though, A8 should have enough power to process the graphics, but we also have cases of people having their apps suddenly closes in battle and have to restart often; most of these cases are because of having lesser specifications than the game demands. But why not try it yourself? Grab that 3 GB RAM Android, grab a Raikou/Gilgamesh support, and fire their NPs. If it goes smoothly and your game does not exit by itself five minutes later, you're good.