Nexus Software Systems
Local-first • Household-ready

BillPlex — Smart Expense Tracker ✨

Track shared & personal expenses, get real-time budget insights, and keep devices in sync peer-to-peer — with privacy by design.

Last updated: October 23, 2025

Hero screenshot
Local-first • No sign-up • P2P Sync

Your data stays on your device. Share only when you decide — manual backups with PIN or device-to-device sync.

  • Local storage
    100%
  • Cloud accounts
    0
  • Household-ready
    Yes
Download on the App Store

How it works

Three simple steps to stay on track.

1

Add expenses fast

Amount, date, category, notes, member — with shared vs. personal, optimized for speed.

2

See insights instantly

Watch your month in real time — predictions, per-member stats, and trends.

3

Back up & sync locally

Create manual backups you control or sync devices peer-to-peer. No cloud account required.

Core features

Everything you need — nothing you don’t.

Budget & Predictions

  • Live budget progress & forecast
  • Monthly recap with highlights
  • Year-over-year trends

Breakdowns & Insights

  • Group by category or member
  • Interactive charts (pie, bars)
  • Tap-through to raw expenses

Control & Privacy

  • Local-first storage
  • Manual import/export with PIN
  • Device-to-device sync (no cloud)
Live overview

Stay on track, live

See spending, remaining budget, and an end-of-month forecast updated in real time. Small highlights call out peak days and category shifts so you can react early, not after the fact.

Stay on track, live
Add in seconds

Fast entry, fewer taps

Everything you need on one screen—amount, date, category, notes, member, and personal/shared. Smart defaults and focused shortcuts help you log transactions without breaking your flow.

Fast entry, fewer taps

Feature Highlights

Deeper analysis when you want it, without getting in your way. Explore breakdowns, charts, and longer-term views with simple, predictable controls.

Insights & Breakdown

Expense Breakdown
Expense Breakdown

Drill into where money really goes. Switch between category and member views, apply year/month filters on the fly, and jump directly to raw expenses with a single tap. Designed to answer “who/what/when” without friction.

  • Group by category or member
  • Quick filters (All / Shared / Personal)
  • One-tap drill-down
Visualization Charts
Visualization Charts

See proportions and trends at a glance with clear, legible charts. Pie charts surface the big buckets fast, while bars help you compare performance across time and categories.

  • Interactive pies & bars
  • Readable legends & tooltips
  • Trend-aware layouts

Planning & Control

Recurring Expenses
Recurring Expenses

Create dependable repeating rules that match real life—daily, weekly or monthly. Pause when you need to, skip a cycle, and preview what’s coming up so nothing sneaks past your budget.

  • Flexible frequency rules
  • Pause / Resume / Skip
  • Upcoming at a glance
Budget Allocation
Budget Allocation

Allocate your total budget across categories and monitor progress with a calm, predictable UI. BillPlex flags overspending early so you can adjust before it matters.

  • Caps per category
  • Progress tracking
  • Early overspend warnings

Yearly View

Yearly Insights
Yearly Insights

Understand seasonality and momentum across months. Compare periods side by side to spot patterns, trends, and outliers that shape better decisions.

  • Month-by-month comparisons
  • Year-over-year context
  • Quick filters

Privacy, by design

Your data stays on your device by default.

  • No cloud account — you stay in control.
  • Optional manual export for backups and transfers.
  • Optional local device-to-device sync; nothing uploaded to the internet.
Read the Privacy Policy