# Create Custom App
The purpose of creating a custom app is to have write access to the Lark Base file
Access , chọn **CREATE APP**
Select **Create Custom App**
Put **Name**, **Description** and select **Create**
In the **Add Features interface**, select **The Add Button** in the **Bot** section
In the **Permission & Scopes interface**, scroll down
Select 50 / page
Drag up and tick as shown to select all
Then scroll down and go to page 2, and 3, and do the same to grant full permissions to this application.
Note: Permissions are very important, and you should consider carefully when granting permissions to the application, however This is a Custom App you create and use yourself, so granting full permissions is okay, Don't reveal AppId and AppSecret out is fine
After adding 136 permissions, you choose to **Add in bulk,** choose **Confirm**
In **Set the range of contacts data to access** section, you choos **Configure**, choose **All member**, choose **OK**
Then turn on **Version Managements & Release**, select **Create a version**
Enter as shown, then select Save (note the Availability section, I left it All to allow all users to use it)
Choose **Submit for release**
In the Lark Admin section, , you can see the app you just submitted, Select Review
Then select Approve
Go back to the Lark Developer, Credentials & Basic Info section, and copy the App ID and App Secret, I will change it into the workflow later.
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