Mobile App for Task Management & Reminders

We seek to develop a mobile app to help certain people manage their daily tasks, and appointments more effectively. The app will include voice-based interaction, customizable reminders, and emergency alerts to ensure ease of use and reliability. Key functionalities include reminders, appointment scheduling, and caregiver notifications. The app should have a simple, intuitive interface designed specifically with large buttons, clear fonts, and easy navigation. Experience with voice recognition, push notifications, and cross-platform development (e.g., Flutter, React Native) is highly preferred.
Should have solid experience in APIs like Dialogflow, OpenAI GPT, or TensorFlow Lite. Should Use pre-trained models. Knowledge of integrating cloud services like Firebase or AWS may be needed.Use Google Speech-to-Text or Apple Speech Framework for voice recognition.
Integrate Dialogflow or OpenAI GPT for NLP. The project timeline is 3 months, focusing on delivering a high-quality, functional product.
Please provide a detailed proposal, including your approach, estimated timeline, and cost. Automated answers/bids will be rejected. This is not going to be a commercial product, so please make it affordable. The product should be developed in such a way that there are no issues in getting into Apple app stores or Google App store.