The trick isn't to stop checking, because that's almost impossible if you have your phone nearby, but to change what you expect from those apps from the start. If you go in thinking you're going to meet your partner or someone special, disappointment is guaranteed. Most conversations die out, most matches lead nowhere, and that's just how they work. It's not that something's wrong with you or that you're not enough - it's the format. Accepting this mentally sooner rather than later saves you a ton of emotional frustration.
Where I see a lot of people miss the mark is this: you shouldn't have the apps as your only way of meeting people. If Tinder and Bumble are all you're doing to socialize or look for a partner, your phone becomes a window into your self-esteem. When there are no matches or someone disappears, it feels personal. But if you have other things taking up your headspace - friends, activities you enjoy, even just going for a walk with no goal - the apps automatically take a backseat. Then you check every now and then without that emotional weight.
My practical advice is different from the "phone in another room" thing: turn off notifications directly. That way every message won't grab your attention. Open it when you feel like it, not when the app pushes you to. And if someone disappears after a nice conversation, remember that they're probably doing the same thing with ten other people. It's not personal rejection; it's that people don't know what they want or they have a hundred options open. That says something about them, not about you.