Internal Employee Connect Android App

I need to build an employees connect app to be used inside my company. I do not need to publish it on playstore yet. But I need a functional app, aimed at android. Each employee should have a profile page, and should be able to see their Name, Designation, Dept., Official email, Official phone no (these cannot be changed by them), thay can reset password, view and update emergency contact information etc in the profile section

2 types of users
normal users and administrators

Administrators should be able to manage user information that cannot be managed by users themselves

Pages/Sections in the app:

Daily Check In (Same for both users, allowed to be entered only once a day, when they sign out)
(Employees have to answer below questions)
Write summary of what happened today at work?
Did you face any difficulty in work today? If yes then what?
On a scale of 1-10, how happy do you feel today?
[Submit Button]
Scheduled Events
Will see the events scheduled for today, and a quick highlight of upcoming events
Scheduled Meetings
Will see the meetings scheduled for today, and a quick highlight of upcoming events
Leave of Absence
Apply for Leave
Date for which leave is required: [select date]
Duration: ____ days
Will rejoin work on: [select date]
Type: Casual / Medical / Earned Leave
Reason:____________________
Work reassigned to: ________________________
[Submit]
Apply for Partial Day off
Date for which leave is required: [select date]
Time of leaving: [select time]
Duration: ____ hours
Will rejoin work on: [select date]
Type: Casual / Medical / Earned Leave
Reason:____________________
Work reassigned to: ________________________
[Submit]
Application Status
Employees will see only already applied applications and if the day is not yet started. They have an option to cancel the application if it is before time of permission
History
All elapsed Permissions and leaves
Expenses
Submit new
Date:_________
Amount:_________
Category:__________
Explanation:_________________
Mode of Payment:_____________
Add Image [Image]
[Submit for approval]
View Submitted Expenses
Exp 1 Amount
Category
Approved / Pending / Reimbursed (Every Expense is Tile, upto 10 expenses in one page, Approved is green tile, reimbursed is blue tile, pending is orange tile, latest first)

If administrator user, Expenses should have approval screen only.


All data to be stored in firebase, except for expenses, to be stored in online spreadsheet