Every transaction lives on your device
Accounts, categories, and history are written straight to an on-device database. No sign-up screen stands between you and using the app — because there's nothing to sign up for.
Quantum-resistant · Zero ads · 100% local by default
Your money.
Your money.
Your device.
Nobody else's.
Gravity Fintracker tracks every dollar without ever needing to see it. No accounts, no ads, no analytics — and when you do want to sync across devices, even we can't read your data.
No ads, ever — not even one
A money app shouldn't be selling your attention. Gravity Fintracker has no advertising SDK, no attribution tracking, and no monetization based on your data, full stop.
Spending analysis that never leaves your phone
Savings rate, top categories, unusual transactions — all computed on-device. No data is sent anywhere to generate these insights.
Optional sync even we can't read
Turn on multi-device sync and your data is encrypted with AES-256-GCM using HKDF-SHA512 derived keys before it ever leaves your device. The server only ever stores ciphertext.
By the numbers
Built to a higher standard.
Every claim below is something you can verify in the app itself — nothing here is marketing fluff.
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AES-256-GCM encryption with HKDF-SHA512 key derivation for optional sync — the same class of cryptography used to protect classified data.
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Ads shown, ever.
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Platforms: Android, iOS, Windows, macOS, Linux, Web.
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Of your data stored locally unless you opt into sync yourself.
Zero-knowledge sync architecture
The sync server (Supabase) stores only ciphertext. Your passphrase and derived keys never leave your device — not even we can decrypt your synced data.
Why we built it this way
Three rules we don't break.
Your data is yours
Local by default, exportable in open formats (JSON/CSV) any time, and deletable by simply uninstalling the app. No lock-in, ever.
Attention isn't for sale
No ads, no engagement-maximizing dark patterns, no push notifications designed to bring you back. Just a tool that gets out of your way.
Encryption is the default, not the upsell
Quantum-resistant encryption for sync isn't a paywalled feature — it's how the feature works, period.
Track your money
without being tracked.
Free forever for local use · No account required · AGPL-3.0 open source