Important considerations for Android app development include defining clear objectives, prioritizing user-centric design for a seamless user experience, ensuring platform compatibility across various Android versions and devices, optimizing app performance for minimal loading times and crashes, implementing robust security measures to protect user data, conducting regular testing for a stable and reliable app, complying with app store guidelines for smooth approval and distribution, planning for continuous updates to introduce new features and address feedback, establishing a data backup mechanism for prevention and recovery, and integrating analytics tools for data-driven decision-making.