mobile app

Hi, I want to develop a mobile app, in android and ios. Have you done before any educational exercise? My app is an interactive based playing educational exercise and wins coin and rewards. Specific points - login - upload photo - in freemium - (age 2 above) each age group have 50 exercises, Total 13 groups - games designs in unity 1) ATTENTION – 10 levels – 50 GAMES 2) MATHS – 10 levels – 50 GAMES 3) GK – 10 levels – 50 GAMES 4) PROBLEM SOLVING – 10 levels – 50 GAMES 5) RECOGNITION – 10 levels -– 50 GAMES - demonstration of game - show icons of the home page, records, coins, scores, parents guidance, settings, etc.. - voice of content - sound content - timer - growth report chart - notification - upgrade premium - referral code - chat box - take appointment - add many languages - an in-app purchase - expert register with us - get an appointment with an expert - calling - video calling - chat box - can see an expert's time and fees - tracking records - how many time logged in - sharing with friends Here I have mentioned almost the main points that I want to apply in the application, my budget is $ 500 of the complete project. Kindly looking in this matter and revert me back as soon as possible. Thank you.