Android apps are bits of software that run on the Android operating system. They can be installed on Android TVs, tablets, and phones. They are extremely adept in making use of the touchscreen, camera and GPS features of the device. There are a lot of apps installed on an Android phone however, could affect the battery’s life and performance.

The process of creating Android apps requires an understanding of the Android platform, including its design principles and frameworks. It also requires a solid app architecture, which separates UI- and OS-related codes into components that share responsibilities. These components can be activated in asynchronous fashion by the system via a broadcast mechanism triggered by intents.

Kotlin is becoming more popular as a language that is used for Android development. Both languages are supported by Android SDK. On the web, there’s an enormous community of developers who can help newcomers get used to the language and help with any issues.

The Android OS itself is divided into layers, with the application layer comprising the standard apps that come with the operating system along with the specialized apps bundled with a particular device such as the music player or phone dialer. The Android application layer is comprised of custom firmware, like CyanogenMod their explanation or OMFGB. These can be installed to customize the functionality of certain devices.

Another factor that prevents some apps from working is compatibility. If an app has been made available for the US market, but isn’t compatible with your European device, it will not function on it and will be marked as “incompatible” in the Play Store.