Android App from Excel Tracker

I need a native-Android application that reproduces the workflow now handled in my Excel sheet. The sheet records every job, lets the person doing the work enter his direct costs, and then helps me track what has already been paid and what is still outstanding. I want the same data-entry fields and the same automatic calculations migrated into an intuitive mobile interface so nobody has to touch the spreadsheet again.

Two distinct roles are required.
• Job performer: opens the app, chooses or creates a job, keys in labour, material or travel costs and immediately sees the calculated total for that job.
• Manager/Administrator: sees every submitted job, the running balance of payments, marks items as paid, and can export a simple summary report for accounting.

Core features
• All current Excel formulas reproduced so totals and balances update instantly.
• Clean, form-based data entry optimised for Android phones.
• Local database (SQLite or Room) so the app works offline and syncs the moment a connection is available.
• Role-based login to separate permissions for field staff and managers.
• Simple filter/search to find jobs by date, worker or payment status.
• One-tap export to CSV or PDF for month-end reporting.

Deliverables
• Release-ready APK for installation on any recent Android version.
• Full Android Studio project with well-commented Kotlin or Java code.
• Brief setup document showing how to add new calculation rules if my Excel sheet changes.

Acceptance criteria
1. Every calculation in the original sheet produces the same numeric result inside the app.
2. A test job created by the performer account appears instantly in the manager view.
3. Payment status toggles update running balances correctly and are reflected in the export.

Once everything is working as described and the source is handed over, the project is complete.