# Connect or edit an app connection

App connections house app authentication, data syncs, stored records, and workflow actions.

{% hint style="info" %}
There is no limit to the number of apps you can connect to an account
{% endhint %}

## Adding a new app connection

To connect a new app:

1. Click **+ New App Connection** in the left-hand menu under "APP CONNECTIONS"
2. Select the desired app from the list of available apps
3. Click **Add Connection**.

{% hint style="warning" %}
If you don't see an app you need, reach out to <support@middle.app>. They will either need to set up your organization with access to this app or it's an integration that has not been developed yet in Middle.
{% endhint %}

## Authenticate

When you connect a new app to an account, you will be taken to the connection details page to authenticate.&#x20;

To re-authenticating an existing app, go to the app connection and click **Edit Connection Details**.

Every app has [a different authentication](https://docs.middle.app/middle-docs/guides/app-reference). Depending on the app, you may need to enter credentials in a form or you may need to complete an OAuth flow

You'll also have the ability to select which version of an app you'd like to use. In general, you'll want to use the pre-selected version.

{% content-ref url="../guides/app-reference" %}
[app-reference](https://docs.middle.app/middle-docs/guides/app-reference)
{% endcontent-ref %}