Adding a widget couldn't be easier:
Navigate to the home screen on your device and press down on your background (as shown in Step 1. below)
You should notice your home screen become editable and with this, a small additional symbol appear in the top left corner of your screen (as shown in Step 2. below)
Select this addition symbol and your widget library will open. Enter "OVO Charge" in the search bar and the app should be returned with all the widget options to choose from (as shown in Step 3. below)
Just select the widget you need, place it on the screen and you're good to go!
Some widgets require certain location sharing permissions to function exactly as expected. Once added, the widget will inform you if additional permissions need to be added.
Adding a widget doesn't mean installing anything new - widgets are downloaded and installed on your device when you download an app from the App or Play store. All you need to do is choose whether to display the widget on your home screen.