If you want to know which apps are using the most battery, there's no need to download a separate app. Both Android and iPhone offer a built-in option to view battery usage.

How to check on an Android phone?
The settings may have slightly different names on different manufacturers' phones, but the process is generally the same.

Open Settings on your phone.
Go to Battery or Battery & device care.
Now tap Battery Usage or Battery usage since last charge.
Here you will see a list of apps.
The app with a higher battery percentage is using more of your battery.
For example, if Instagram, YouTube, or a game is shown at the top of Battery Usage, it means that the app has been consuming more battery recently.

How to find out on an iPhone?
This information can also be easily viewed on an iPhone.

Go to Settings > Battery. Here you can find information about the battery usage of apps over the last 24 hours or the last few days. You can also tap an app to see how much battery it used while the screen was on or in the 's