I rarely close apps on my phone. Some people swear by it, but on a newer high-end phone, it’s just not necessary — unless the app is buggy or torching your battery.
You might naturally assume that failing to close an app you’re not using will leave it “running” in the background on an iPhone. If you don’t close the app manually, it will drain your device’s battery life, right? While this is an understandable conclusion to reach, it doesn’t properly account for what force closing apps on your iPhone really does to the battery.
Read more here about other myths as well.