Flutter App - Google Sheets

Simple Project: Native Android App and Native iOS App. Main screen w/ 7 buttons (6 buttons corresponds w/ it's own Google Sheet: 1 button is view/read only google calendar). Each button will lead to a page where most data will be pushed to existing Google Sheets. Most pages have 3-5 pushes. One page has 2 pulls and 3 pushes. 2 pages are pull only and read only. 1 page is pull from google calendar.

Attached files have Customer info and logo removed. Will upload actual files when freelancer is hired.