For Android app developers.
To make it easier to check the status of the "Don't keep activities" in developer options.

Option of "Don't keep activities" is a convenient to check whether the application is not or fall on the screen rotation, etc..
However, when you use this option, you will not be able to confirm the normal life cycle of Activity.
I want to check the "Don't keep activities" more easily.
Whether you have enabled the setting, open the developer option, yet must scroll to the bottom.
This is annoying.
So the answer to a desire to confirm the more quick setting value at the time of development is this app.

This app shows the "Don't keep activities" option enabled or not.
It also offers widgets that display the status of the "Don't keep activities".
The widget updates at regular intervals (by default every hour).
At this time, the state of "Don't keep activities" is displayed in the widget, the actual state may differ.
In either case, you will see the current settings if launch the app.

This app only read the status of the "Don't keep activities" option, you can not make changes to the settings.
Please go from the developer options change the settings.