I've been playing Dragon Era for a while now and while I love the game I think there's an issue that can't just be ignored as of now.
My iPhone is set on "autolock: 1 minute" by default, and whenever I'm on some raids that take several minutes (at least 30 minutes usually) to go through I have to regularly tap on my screen in order not to be disconnected. I'm talking about the easier raids where I've set autospin since I'm sure to win in those, and since the autospin feature exists I supposed I wouldn't have to still regularly touch the screen. Otherwise why would this feature exist in the first place?
Most apps like this have an anti-sleep feature limited to the game itself rather than extended to the phone (I mean, it only activates while playing that game and once you exit from the app the phone will go in sleep mode normally with the settings you chose), so I think it shouldn't be too much to ask for. Here is a screenshot to show what I'm talking about:

(Well, maybe not many games since those are usually casual games where you'd log off after a couple minutes, but think of apps like Youtube for example: if we had to tap every few seconds while watching a movie it would be insufferable)
I know Playmage is busy with other things concerning DE already, but in my opinion this feature shouldn't be postponed or ignored altogether. As things are now I'm forced to change my phone's autolock settings right before and after playing DE, and you can guess this can be really annoying in the long run. As I'm sure you care for your customers' happiness I hope you will work on this aspect of the game as well to make sure you will keep as many players as possible and not see them quit out of frustration after a month or so.