Sleep Tracker - sleep sounds - admin panel ( Proof you made one already, send links)

I'm looking for a sleep tracker app akin to Better Sleep app (install from Playstore and review) with a fast delivery time. The app must have a variety of features aimed at helping users improve their sleep quality and manage their stress levels.

Core Features:
- Sleep Sounds: You should integrate a variety of soothing sleep sounds within the app.
- Comprehensive Sleep Tracker: The app should be capable of tracking sleep patterns in a detailed and user-friendly manner.
- Admin Panel: This will host guided meditations, bedtime stories, and relaxing videos.
- Daily Affirmations: A section dedicated to positive daily affirmations.
- In-app ads and subscriptions: Monetization through ads and subscriptions is a key part of the project.

Key Features:
- Creativity is a major plus: The app should feature guided meditations, calming music, and nature sounds. Being creative and able to develop engaging and soothing content will be a significant advantage.
Technical Requirements:
- Cross-platform development: The app needs to be developed for both Android and iOS.
- Quick turnaround: I'm leaning towards Flutter or React Native for a swift delivery.

You must provide links to sleep apps you've developed on Playstore for my review. Experience in this field is critical for the success of this project. Looking forward to your proposals.