Portfolio / Kotlin / Android lane / BillMinder
KT

BillMinder

Bill tracker with alarm-style reminders

KotlinAndroid
Open source on GitHub Open the Kotlin / Android lane
Delivery
Source-first
Browse code, README, and release notes on GitHub.
Primary lane
Kotlin / Android lane
The clearest adjacent context for this project inside the portfolio.
Freshness
Updated Apr 26, 2026
Latest release
No tag yet
README is the clearest project overview right now.

Preview

Using the generated project card as a clean fallback until a live capture is available.

BillMinder card

Source at github.com/SysAdminDoc/BillMinder.

README

Cached at build time, cleaned up for in-site reading, and linked back to the canonical GitHub source.

Bill Minder

Version License Platform

BillMinder v2.0.0

A bill tracking and reminder app for Android. Never miss a payment again.

Features

Core

  • Bill Management - Add, edit, delete bills with name, amount, due date, category, recurrence, notes, tags, and payment URL
  • 13 Categories - Rent, Utilities, Insurance, Phone/Internet, Subscription, Loan, Medical, Transportation, Groceries, Education, Entertainment, Childcare, Other
  • 6 Recurrence Types - Weekly, Bi-Weekly, Monthly, Quarterly, Yearly, One-Time
  • Quick Mark Paid - One-tap from home screen or notification
  • Swipe-to-Delete - Swipe left on any bill to delete

Reminders (Alarm-Style)

  • Exact Alarms - Uses AlarmManager.setAlarmClock() for reliable delivery (same as alarm clock apps)
  • 7 Reminder Timings - Day of, 1/2/3 days, 1/2 weeks, 1 month before
  • Dual Reminders - Two separate reminders per bill
  • Snooze - 1 hour or tomorrow snooze directly from notification
  • Boot Persistence - Reminders survive device restarts
  • Overdue Notifications - Persistent (non-dismissible) for overdue bills

Dashboard

  • Monthly Summary - Total due, paid, remaining with animated progress bar
  • Section Badges - Overdue/Upcoming/Paid sections with count badges
  • Search - Full-text search across bill names, notes, and tags
  • Sort - By due date, amount, name, or category
  • Filter - Horizontal scrollable category filter chips
  • Staggered Animations - Bills animate in sequentially

Calendar

  • Monthly Calendar View - Color-coded dots for bills on each day
  • Day Detail - Tap any day to see bills due

Stats & Charts

  • Lifetime Spending - Total across all bills
  • Category Pie Chart - Animated donut chart with legend
  • Monthly Trend - 6-month line chart with grid
  • Per-Bill Lifetime - Total spent on each individual bill with average

Data

  • JSON Backup/Restore - Full export and import of all data
  • CSV Export - Payment history as spreadsheet
  • Room Database - SQLite with migration support

Security

  • Biometric Lock - Fingerprint/face unlock to protect financial data

Widget

  • Home Screen Widget - Glance-based widget showing upcoming bills, amounts, and days until due

UI/UX

  • Bottom Navigation - Home, Calendar, Stats, Settings tabs
  • AMOLED Dark Theme - Catppuccin Mocha throughout
  • Edge-to-Edge - Full immersive display
  • Auto-Pay Tags - Visual badge on auto-pay bills

Tech Stack

  • Kotlin 2.1.0 + Jetpack Compose + Material 3
  • Room 2.6.1 with migrations
  • AlarmManager for exact alarm-style reminders
  • Glance 1.1.1 for home screen widget
  • AndroidX Biometric for fingerprint/face lock
  • Navigation Compose with bottom nav
  • Canvas-drawn pie chart and trend line (no chart libraries)
  • DataStore for preferences

Build

./gradlew assembleDebug

APK output: app/build/outputs/apk/debug/app-debug.apk

Read on GitHub → github.com/SysAdminDoc/BillMinder