Provide assistance in creating a google app for a gym

Job ID: 36286853

Budget: $250 – $750 AUD

Just chasing someone to help with creating an app through google. I run a gym and currently use google sheets to provide lifting goals and record their results at the start of an 8 week challenge and the end of an 8 week challenge. The problem I'm having is that people have to spend quite a bit of time scrolling from "Aaron" to "Therese" in checking and entering their data.
I have 6 samsung tablets and would love to be able to have 1 tablet dedicated to a group of 3-5 people where their tablet would be divided into 3-5 sections. In those sections they would drop down a box and select their name which would bring their individual lifting goals in that section of the tablet. Would also love to have an option where they can go and look back to previous personal bests on that lift. I would also like for them to see their results from the start of an 8 week challenge and the end and have a comprehensive wrap up of their results in a professional layout.
I've got all the data just not sure where to start or how to.
In the back end of the app would be me continuing to use google sheets and set their predictions but have it linked to the new app making it clean and clearer on their goals.
I hope you can help.