There are several factors that define the time-frames for an Android development project. Here we should mention the project complexity, namely the number of features you want to implement, the development team composition, and the project management methodology adopted in the Android app development company. To be more specific, a standard team consisting of four units will build a simple custom Android application in 4-4 months, provided that no backend integration from scratch is required. In case your app needs a server and custom APIs, the development team will need up to 12 months. Speaking about project management methodology, the Agile approach will help speed up the development process and shorten the timeline.