This popular app for the new Galaxy S10 phones makes the best use of Samsung's hole-punch camera when you're not taking selfies

First, install the free Energy Ring app from the Google Play Store.

You can tap or click on this link to get the Energy Ring app from Google's Play Store.

Once in the app, tap the switch symbol on the top right of the app. It can be difficult to see if you don't know what to look for.

The app will take you to the S10's notifications access menu, where you simply need to tap the switch for Energy Ring.

A popup will appear that says that Energy Ring will have a worrying amount of access to your notifications, "including personal information such as contact names and the content of messages you receive."

This popup is somewhat alarming, and it's understandable why someone wouldn't want to give Energy Ring this kind of access.

Energy Ring's developer IJP says in the app's description on Google Play that "Energy Ring does not read any Notification whatsoever, it merely relies on it to be alive. Be assured that the App does NOT access anything."

It's difficult to tell how trustworthy a small, third-party developer like IJP actually is. If it's worth anything, the prominent XDA-Developers site cites IJP (or "jagan2" as he's known on the site) as a "recognized developer." It might not be an official declaration of trustworthiness, but I highly doubt that XDA-Developers would promote a developer or app that compromises your security.

If you're comfortable with XDA-Developers' backing and IJP's claims that the Energy Ring app doesn't access your notifications, you can tap "Allow" on the popup.

Another popup will ask you to allow the Energy Ring app to "Appear on top," which you should switch on to make it work.

Once you've installed and set up the app, you'll see a ring around the Galaxy S10's camera cutout that indicates remaining battery life.

Unfortunately, the ring doesn't stay on when your Galaxy S10 goes to sleep and the screen turns off.

You can adjust the thickness of the ring, which direction it moves, and the colors that represent a range of remaining battery life.

You can set the ring to automatically turn off when using a full screen app, which turns off the ring when you're watching a video. This is what it looks like if you keep it on.

It could actually be useful to keep on the Energy Ring if you want to keep tabs on your battery life while watching videos.