> ## Documentation Index
> Fetch the complete documentation index at: https://docs.billbasket.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Understanding offline-first

> Learn why BillBasket runs fully offline, where your billing and inventory data lives on your device, and how it stays safe without the internet.

BillBasket is built **offline-first**: every feature — billing, stock,
customers, reports — works with no internet connection at all. Your shop
doesn't stop because your Wi-Fi does.

## See it on your device

<Tabs>
  <Tab title="Phone">
    <Frame>
      *Screenshot coming soon — Android phone view.*
    </Frame>
  </Tab>

  <Tab title="Tablet">
    <Frame>
      *Screenshot coming soon — Android tablet view.*
    </Frame>
  </Tab>

  <Tab title="Windows PC">
    <Frame>
      *Screenshot coming soon — Windows desktop view.*
    </Frame>
  </Tab>
</Tabs>

## Where your data lives

All your billing, stock, and customer data is stored **encrypted, on your own
device**. Nothing needs to be uploaded anywhere for BillBasket to work.

## What still needs internet

A small number of things use the internet when it's available, but never
block your daily billing if it isn't:

* Activating or checking your license
* Optional cloud backup and sync between your devices (if enabled for your plan)
* On-device AI features that call out to cloud AI (only when you explicitly use them)

## What this means day to day

* You can keep billing during a power cut on a charged laptop/phone, or when
  your internet is down.
* Your data isn't lost if you lose signal or your connection is slow.
* Regular local backups are still important — see [Backing up your
  data](/customer-guide/data-and-backup/backing-up-your-data) — since
  offline-first protects you from *no internet*, not from a lost or damaged
  device.