A common request from people. is to build an app that has the same iOS and Android design features. A reasonable ask, by all means. The problem is that iOS and Android design is specific to their individual platforms. As in, each platform has their own design styles, idioms and ideologies. Therefore, users expect apps to look and act in a certain manner according to their platform of choice. And it can be really difficult to move away from this! Read more about differences between Designing Native iOS Apps and Native Android Apps
https://steelkiwi.com/blog/differences-between-designing-native-ios-apps-and-native-android-apps/