Inside of Android Nougat There is a Dark Mode that changes the interface in the colors that are displayed to adapt to a shape that affects the eyes less and, therefore, is recommended even for use at night. But, yes, to be able to activate it it is necessary to follow some complex steps or use a third-party application, such as Night Mode Enabler.
This is a free development that is available in the store Play Store, so you have good security of what you get, do not put at risk the terminal in which it is to be installed, be it a phone or tablet. To start with the download, taking into account that we follow the steps for Android 7.0, you must use the image that we leave below:
Using the Night Mode Enabler
Once the development is installed, the following is to give access from the Settings icon in the shortcuts. To do this, slide this from the top and press continuously on the cogwheel-shaped icon. You will see that the option of UI interface management.
Once this is done, the following is to open the Night Mode Enabler application from the list of those you have installed and you must perform the only action left to achieve your goal: press the only button that appears on the screen. If the previous step was taken, the switch to dark mode in Android 7.0 it will take effect immediately - you can adjust the intensity of the color.
Is it possible to return to the original appearance? Well yes, since a new icon in the quick access list for it. But, if not, what you have to do is use the button mentioned in the Night Mode Enabler application. Other applications for the Google operating system can be found at this section de Android Ayuda.