need app development in flutter or react native , i just need hybrid app developer android and ios

looking for an flutter developer or react native guru details are: budget 250$ max serious bidder only bid and no discussion about budget as its fixed I will need the application which will have: 1) central diary for the driving school visible to me, 2) separate diaries for instructors where they can manage , set up by themself. 3) There needs to be function of collecting details of the customer which can be exported externally as CSV file. 4) Option of Confirmation of Terms and Conditions of the School by signature. It is not possible to access an app if customer doesn't confirm Terms and Conditions. 5) I can sent via sms application download invitation to customers 6) Central App will send to customers a reminder about lesson 24 hours before. 7) Private chat with customer through the app chat 8 Different lessons with changeable pricing 9 GDPR info is privacy policy page