Android apps are software applications that run on the Android OS. They can be downloaded on Android tablets, phones, and televisions. They excel in making use of the touchscreen, camera, and GPS features on the device. The addition of numerous apps to an Android device can affect the battery’s life and performance.
Understanding the Android platform and its design principles is essential to developing Android applications. It also involves the implementation of an appropriate architecture for apps that separates UI and OS-related code into parts that share responsibilities. The system is able to activate these components asynchronously through a broadcast mechanism that is triggered by intents.
Java is the preferred language for Android development, but Kotlin has gained popularity in recent years. Both are supported by Android SDK. Online, there’s an extensive community of developers who can help newcomers learn the language and solve any issues.
The Android OS itself is divided into multiple layers, with the application layer comprising the default standard apps that are included with the operating system, as well as the custom apps that are bundled with a specific device like the music player or phone dialer. The Android app layer includes custom firmware, like CyanogenMod or OMFGB. They can be installed to alter the functions of specific devices.
Another reason that hinders certain apps from functioning is compatibility. If an app is created for the US but not compatible with your European device, it won’t work and be displayed in the Play Store as “incompatible”.

