The most challenging problem you have solved in Android application development:

• There are a lot many apps out there, so creating one that stands out might be difficult. If you want to save your app and overcome mobile app development obstacles, you'll need to add intuitive design, usable functions, and images for a great experience.
• While developing apps, standard devices, single operating systems, and screen sizes are not the only things to consider. This is due to the fact that people are using devices with different screen sizes. In order to overcome the problems of mobile app development, developers should use a responsive design while creating an app.
• There's no doubting that creating interactive mobile apps is a fantastic method to attract new clients. Apps can become more useful and interactive with the addition of built-in sensors. This can be difficult, but interactions should be present during the design phase to make the process easier.

Read More: How can I install some APK files which shows 'app not installed' when I installed normally?