Mobile app for pet and child services

I am looking for a freelancer to develop a mobile app for me that has features for pet and child services. This app needs to be developed for both iOS and Android platforms. This app will be used by parents and pet owners alike and it must have some key features including a chat function and appointment scheduling. I have an estimated budget of less than $1000 for this project. I expect that the freelancer should be able to deliver quality work within the specified budget and timeframe.