# Apps and integrations overview

> The Apps page — point-of-sale syncs, e-commerce, migration tools and connected third-party apps — and how each kind of integration posts to your books.

Canonical: https://docs.getonebooks.com/integrations/overview/
Language: en
Documentation index: https://docs.getonebooks.com/llms.txt

**Apps** in the sidebar is where you connect other systems to OneBooks. Search by name, category or feature, and filter by **Installed**, **POS**, **E-Commerce**, **Migration** or **Apps**.

![The Apps page with cards for Loyverse, Shopify, Lightspeed, Clover, Square and Tally, and the category filter](https://docs.getonebooks.com/screenshots/en/integrations-hub.webp)

## Two ways integrations post to your books

| Kind | Integrations | What lands in OneBooks |
|---|---|---|
| **Document-level** | [LithosPOS](https://docs.getonebooks.com/integrations/lithospos/) and apps built on the developer platform | Real invoices, payments and returns, one per POS sale — with customers, items and receipts. |
| **Daily summary** | [Shopify](https://docs.getonebooks.com/integrations/shopify/), [Square](https://docs.getonebooks.com/integrations/square/), [Clover](https://docs.getonebooks.com/integrations/clover/), [Lightspeed](https://docs.getonebooks.com/integrations/lightspeed/), [Loyverse](https://docs.getonebooks.com/integrations/loyverse/) | One balanced journal entry per store per day (a Z-report): sales by tax rate, tax collected, tips, and cash or bank by payment type. |
| **Migration** | [Tally](https://docs.getonebooks.com/integrations/tally/), [spreadsheet import](https://docs.getonebooks.com/data/import-export/) | Master data, opening balances and, for Tally, full voucher history. |
| **Connected apps** | <BrandLogo name="claude" label="Claude" size={16} /> <BrandLogo name="chatgpt" label="ChatGPT" size={16} /> <BrandLogo name="openclaw" label="OpenClaw" size={16} /> and other OAuth apps | Read reports and create proposals through the API — see [Connected apps and OAuth](https://docs.getonebooks.com/integrations/connected-apps/) and [Connect Claude, ChatGPT and other AI agents](https://docs.getonebooks.com/ai/mcp/). |

## What every sync guarantees

- **No double posting** — each day (or each POS sale) is recorded once, even if a sync runs twice.
- **Balanced entries** — every posting debits and credits equal amounts; the tax collected goes to the tax account and appears on your tax report.
- **Reversible re-syncs** — re-syncing a day reverses the earlier entry and posts a fresh one; nothing is edited in place.
- **Period locks apply** — a sync cannot post into a locked fiscal year.

## Related

  - [How the ledger works](https://docs.getonebooks.com/accounting/how-it-works/)
  - [Cash and bank accounts](https://docs.getonebooks.com/banking/accounts/) — Where POS tenders are mapped to.