Mobile app for planning app

I am looking to hire someone to develop a mobile app for a planning app. It should be developed for both iOS and Android, and it should have a moderate level of complexity. I am open to suggestions with regards to specific features and functionalities. The app should be intuitive and user-friendly. It should have a visually appealing design and be optimized for performance and usability. The app should be able to handle data efficiently and provide relevant information in an efficient manner. Additionally, the app should be able to integrate with external databases/services. The end goal is to create a powerful, yet simple, mobile app for planning.