The main thing to consider when designing for mobile is to understand the limitations of the screen. Users will have very less choice to decide on actions on a small screen. The design process should also be with the user in focus and not the guidelines of the ios or android.
Android has defined their own design philosophy which is Material Design which you can read on their blog. All the do’s and don’t of Material Design are provided in it in the form of tutorials, videos, and examples. The same is the case with ios where Apple Human Interface Guidelines are available on their site.
When designing the app for Android, we need to make the flow of the app the user would like to experience and then define a design language to make the UI. Whether you follow guidelines or not is secondary as long as we address the user journey.