Spendium

A private, offline-first expense tracker for Android.
Your data stays on your device and — if you opt in — in your own Google Drive or OneDrive account.
No backend, no analytics, no ads, no account to create.

Get it on Google Play →

Why Spendium?

Your data stays yours

Spendium has no backend server. Everything you record lives in an encrypted on-device SQLite database. We literally cannot see your expenses — there is nowhere for them to go.

Works fully offline

Open Spendium on the subway, on a flight, in the middle of nowhere — it just works. Every screen reads from local storage, every entry is saved locally first. The internet is optional.

Automatic multi-device sync, on your cloud

Want to use Spendium on your phone and your tablet? Sign in to Google Drive or OneDrive and Spendium will keep both devices in sync through a single hidden file in your own cloud account (appDataFolder / approot scope only — Spendium cannot see any of your other files).

Sync runs automatically in the background: on app start, when you bring the app to the foreground, after each edit, and when the network comes back online. There is also a “Sync now” button if you ever want to force it.

Privacy first

No tracking SDKs. Not Firebase Analytics, not Sentry, not Mixpanel — none.
No ads. Never.
No accounts. Spendium does not have its own login system.
Only INTERNET permission. Used solely to talk to OAuth and the public exchange-rate service when you actually need them.
Open source. Audit the code yourself.

Powerful spending analysis

Three complementary views into your money:

Categories — donut chart and per-category totals for any period.
Transactions — flat or date-grouped list with full-text search and category filtering.
Overview — per-day sparkline plus a stacked / line breakdown by category, with an interactive tooltip showing exact amounts.

Choose any period: today, week, month, year, all-time, or a custom range.

Multi-currency with historical FX

Record expenses in any currency. Spendium fetches historical exchange rates from the open frankfurter.dev service and converts everything into your chosen display currency using the rate that was actually in effect on the day of each transaction — not today’s rate.

Available in 15 languages

English, German, Spanish, French, Italian, Polish, Portuguese, Russian, Slovak, Czech, Turkish, Ukrainian, Chinese (Simplified), Hindi, and Vietnamese. The locale follows your phone’s language setting by default and can be overridden in Settings.

Light, dark, and adjustable font size

Material 3 light and dark themes that follow your system setting, plus four font-size presets for accessibility.

Custom categories with icons

Use the seeded default categories or create your own — pick an icon, pick a name, you’re done.

Quick entry with built-in calculator

Add an expense in three taps: amount → category → done. The number pad doubles as a calculator (+, −, ×, ÷) so you can split a receipt on the spot without leaving the app.