The official release date of the Android OS 7 Nougat is October 2016. In the new version, the developers paid a lot of attention to the security of user data. For example, now File-based encryption is used, instead of the block level encryption. So, Android can better isolate all user data and files.
In addition, the backup system is improved, now more settings will be saved. Such as application permissions, settings of a mobile access point and Wi-Fi connection points.
Another important change was the emergence of the ability to change the size of interface elements, and not just the font size. For people with poor eyesight, this will be great news.