# xApps ("dApps")
xApps are web apps. They are offered to users as integrated apps, opened in Xumm for a great user experience. They add value (tools, apps, wizards, ...) for end users. They receive context information when opened, and can interact with some of the native Xumm features & users through Sign Requests.
{% hint style="info" %}
Please read carefully: [Requirements](/environments/xapps-dapps/requirements.md)
{% endhint %}
## Permissions
xApps have extra special permissions, allowing the xApp (web app) to interact with some of the native Xumm features:
* They receive context (user account selected in Xumm when opened, Xumm theme, input params, account type (eg. Tangem / ...)
* They can trigger overlay Sign Requests and receive callback info
* They can trigger the QR scanner and receive scanned QR data
## Opening xApps
xApps can be opened (triggered) in lots of ways:
* In the Xumm shortlist (we feature some apps, they get replaced by frequently used apps by the user)
* From the xApp directory
* By opening a deeplink (browser / from within another app)
* By scanning a QR code
{% hint style="info" %}
To prevent showing a double loader (first the Xumm xApp loader, then your xApp's loader while hydrating / booting) you can enable the "**Xumm Loader Screen**" option in the Xumm Developer Console (xApp tab).\
See [ready()](/js-ts-sdk/sdk-syntax/xumm.xapp/ready.md)
{% endhint %}
### Advanced ways to open xApps
* By attaching an xApp memo to an XRPL TX (so the Event list will show there's an xApp attached to the TX)
* Using push notifications
* From the Event list, as an xApp session pushed to a Xumm user
## xApp example use cases
* Trading interface (offloads signing to Xumm)
* Admission ticket checking
* NFT marketplaces / viewers
* Issuing tokens, checking tokens
* Tools: setting up accounts, crafting advanced transactions, escrows, etc.
* Exchange deposit / withdraw integrations
## Sample code
```html
...
```
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