Prior to the last major update (I think 19.1, correct me if i’m wrong) on IF, the simulator ran perfectly on my phone. At most my phone might have got a little hot after being on for so long while also on charge, but in terms of the app, never any lag or crashes.
After the update, I suffered the mentioned issues. Having heard about the ‘Hotfix 20.1’ I was obviously ecstatic, however within 30 seconds of beginning my taxi, the same issues were apparent. Terrible lag with at most 2-3 other users at the same airport, I wouldn’t even say they were anywhere close to me. The phone was also without doubt overheating in my hands. I’d say the app was running for a mere 5 mins in total.
This thread contains a lot of the information and issues that occurred previously and its the same issue now pretty much. I will summarise my settings below as recommended by @schyllberg
Infinite Flight Version: 20.01.01 (321)
Device Information (OS and model): iPhone 6S, iOS 13.5.1
Render quality: Low
Rendering resolution: Low
Texture quality: Low
Limit frame rate: Yes
If any other information is required don’t hesitate to ask :)