Cross Platform Mobile App Development

I am in need of a mobile app developer who can create a cross-platform mobile app. But i don't know which technology will be perfect flutter or react native. The details regarding the app's purpose and features have not been specified yet but I am open to suggestions. The app is designed for tracking daily tasks, and I need the functionality to compute the next occurrence date for each task based on the date it was entered.

Ideal Skills and Experience include:
- Proficiency in cross-platform app development frameworks (like Flutter, React Native)
- Strong understanding of UI/UX design principles
- Experience with integrating third-party APIs
- Knowledge of app store submission processes for both iOS and Android.
The successful freelancer will help enhance the functionality of the app, making it a more useful tool for daily task management.