Surely you have seen on some occasion the active screen that some friends use to see information without having to unlock the terminal in question. An example is the Samsung Galaxy S7 or the LG G5. If your model does not have it, since the manufacturer does not include it by default, you can get this with the application Always On AMOLED, which has some virtues that other developments do not include.
This work, which can be downloaded from the Play Store by using the link that we left in this paragraph, is specially designed for models that integrate a screen AMOLED, since they are the ones that consume the least when black is the color that is displayed -as is the case in most of the screen-. Of course, if you want to experiment with LCD devices what Always On AMOLED offers, it is possible to do so.
By the way, the requirements of Always On AMOLED, a completely free work, are not very high since having a model with Android 4.4 or higher and 2 MB of free space. In other words, the vast majority of phones and tablets comply with it.
Easy installation and many options
The installation process is really intuitive, since it is the usual one for all the jobs that are downloaded from Play Store. It is not necessary to have a rooted model and, therefore, this is not something that is essential. Once the development is available, the first thing to do is give the permissions necessary for the use of the screen to be accessed (something that is done through the use of a message that appears).
Always On AMOLED is full of options, such as changing the location of the information from time to time so as not to "burn" the pixels. In addition, apart from the time, you can activate the possibility of show notifications they arrive at the terminal. By the way, it is possible to always leave the active screen visible, something that consumes energy but that can be useful to more than one to always know the time (for example).
The operation as we have verified is really good and does not give compatibility problems or any “lag” is added when using it. Therefore, Always On AMOLED is an excellent option if you want to add an active screen to your smartphone if it doesn't include it by default, as is the case with Samsung's most powerful ones. Other applications for the Google operating system you can find them at this section Android Help, where there are interesting options that you will find useful.