I started using Summit a week or two ago, and I really like it. It's a great Lemmy app. But I notice my phone's battery life has taken a hit since then.
According to battery usage, I've been using Summit slightly more than the Reddit app, but Summit has consumed much more battery.
If it's so bad that your phone is literally heating up by having the app open, it points to an infinitely loop within the app. The only issue is I cannot reproduce anything like it so this infinitely loop must be some rare case. I just have no idea what the case is :/