Opal works with the iOS' Screen Time API to check your app usage all day. It runs in the background, helping you monitor your screen time and control access to certain apps. Opal was simultaneously designed to use very little battery, and we usually use 2-4% of your battery in one day. To see how much battery Opal uses on your phone, follow these easy steps:
Opal is indeed running in the background, but its usage of your battery will remain around 2-4% daily. Background Activity means that the app's battery usage — such as when Opal is implementing an overnight block from 9 pm to 5 am, as depicted in the image above — happened while the app was in the background. However, despite Opal being active, it does not mean that your battery is being drained. To confirm Opal's battery usage, please follow the steps listed above.
