If you want to add and customize widgets on iPhone then you must follow the steps that are given below:-
1. The initial step is to install the widgetsmith app on your iPhone.
2. Then open the app and select the size of the widget that you like to customize.
3. Browse through all the options and select a widget.
4. Now tap on the widget to change its theme and tap on customize theme to make your own.
5. Then hold and press down anywhere.
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