Android · Expense & Budget Tracker

Track your money.
Keep it yours.

Oar is a calm, local-first expense & budget tracker. Your financial data stays on your device by default — with optional encrypted backup to your own Google Drive.

100%
Local-first
Kotlin
& Jetpack Compose
Free
& open source
Oar app preview showing balance, transactions, and folders screens
See it in action

Everything you need, nothing you don't

Screenshot: Easily view your recent spends and balance
Easily view your recent spends and balance
Screenshot: Track and manage your spending efficiently
Track and manage your spending efficiently
Screenshot: Schedule reminders for repeated transactions
Schedule reminders for repeated transactions
Screenshot: Group and tag your transactions to manage it better
Group and tag your transactions to manage them
Screenshot: Get on top of your finances with ease
Get on top of your finances with ease
Features

Built to keep money simple

Log it, group it, budget it, and get gently reminded — all in a clean, distraction-free interface.

Transactions

Log income and expenses, then browse them in a paged, filterable list.

Folders

Group related transactions — a trip, a project — and track their combined total.

Tags

Categorize spending and filter your history by the tags that matter to you.

Budget Cycles

Set a monthly budget and track your balance against it across cycles.

Schedules

Set up recurring transactions with reminder notifications so nothing slips.

Encrypted Backup

Optionally back up and restore to your own Google Drive — encrypted before upload.

Biometric Lock

Lock the app behind device biometrics for an extra layer of privacy.

Local-First Storage

All data lives on-device by default; nothing is sent anywhere unless you enable backup.

Local-first, private by default

No account required. Nothing leaves your phone unless you say so. If you want a safety net, back up to your own Google Drive — encrypted before it ever leaves the device — and lock the whole app behind your biometrics.

On-device storage Encrypted backup Biometric app lock
Built With

Modern, open Android stack

Kotlin Jetpack Compose Navigation 3 Room / SQLite Hilt WorkManager DataStore Biometric Firebase