Implicit costs can also be thought of as intangible costs that are not easily accounted for. For example, the time and effort that an owner puts into the maintenance of the company, rather than working on expansion, can be viewed as an implicit cost of running the business.
Android is a mobile operating system developed by Google, based on the Linux kernel and designed primarily for touchscreen mobile devices such as smartphones and tablets.
A Developers Guide to Risky Android App Permissions. The Android Operating System is an open platform based on Linux, integrated into mobile devices, smart watches, tablets and even televisions and cars.