I found out that, by turning off the wifi, deleting every background app and restarting the phone, I could end up with 50% of RAM usage, instead of the 70% I usually see (yes, I found out today).
Are there any other ways in which I could reduce the lag? I have the frame rate icon checked, and everything is on low quality (I may raise the aircraft quality to medium again).
Samsung Galaxy S5.
Last version of IF.