> ## Documentation Index
> Fetch the complete documentation index at: https://docs.budgetbandit.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Sync and privacy
> How your budget stays in sync across web and mobile, works offline, and stays private.
Your budget lives in one place and shows up everywhere you sign in. The app is built
to work offline, sync when it can, and keep your finances private — including from
the people who can see your screen.
## One budget, every device
Sign in on the web and on the mobile app with the same account, and you see the same
budget. Assign money on your laptop and it is already assigned when you open your
phone. There is no manual sync button and no separate copy to reconcile — the two
stay matched on their own.
## Offline-first
The mobile app does not wait for a connection to be useful. Your data is stored on
the device, so you can open the budget, record a transaction, and move money with no
signal at all. When you are back online, the app syncs your changes up and pulls down
anything that changed elsewhere.
This is why the app feels instant: it reads and writes locally first, then syncs in
the background. If you are offline, you see an indicator, and your changes wait
safely until the connection returns. See [Offline](/mobile/offline).
## Privacy mode
Privacy mode hides the numbers on your screen so you can use the app where others can
see it — on a train, in an office, sharing your screen on a call. Amounts blur out,
and you can reveal a value when you need it.
Turn it on from the header on the web, or in the mobile app. On mobile, amounts also
blur automatically in the app switcher, so a glance at your recent apps does not
expose your balances. See [Privacy mode](/account/privacy-mode) and
[Face ID and app lock](/mobile/face-id-and-app-lock).
## The biometric lock
On mobile, you can require Face ID, Touch ID, or your fingerprint every time the app
opens. Even if your phone is unlocked and handed to someone, your budget is not. The
lock uses your device's own biometrics and falls back to your device passcode. See
[Face ID and app lock](/mobile/face-id-and-app-lock).
## Your financial data is not sold or shared
Budget Bandit does not sell your data. Your financial details — balances,
transactions, payees — are not handed to advertisers or data brokers. The app is
built so that the analytics and error-reporting tools it uses do not receive your
financial information.
When you link a bank, the connection runs through Plaid, a regulated provider that
specializes in secure bank connections, so the app reads your transactions without
storing your bank password. See [Connect a bank](/accounts/connect-a-bank).
For the exact terms, read the privacy policy in the app or on the website. This page
describes how the product behaves; the policy is the binding statement.
## Next
Why the app stores amounts as whole numbers, and why you never have to think about it.
Get your data out when you want it.