AOD Battery lets you add the phone battery percentage on the inline widget area.
Highly recommend using the app with iPhones with Always-On display to get the most benefits.
Q&A
Q: The battery percentage shown on the widget does not match the actual battery percentage.
A: The widget can take longer to show the latest battery percentage. You can quickly refresh the percentage by clicking the widget.
Q: The battery percentage shown on the devices is widely different than the actual battery percentage.
A: The widget can take some time to update to show the latest battery percentage. The difference may be more significant in quick charging/discharging events.