Want to develop backend and front end for invitation maker and editor mobile app using flutter Laravel

Hello all, This is Dhruvin from marline media. We have a ready-made website for the invitation cards, Snapchat lenses, Instagram filters and want to develop a mobile app for the same. But in there user should be able to edit text content that is available on cards or lenses and filter. want something like greetings island or another RSVP maker. I like this app for reference: [login to view URL] Please mention your budget in the proposal and also let me know how much time you will need. Regards Dhruvin Patel