Hi,

We are trying to retrieve custom app setting using SOQL via Partner API and able to retrieve all information except default selected app for particular profile. We have googled it but didn't find any info around this.

Below objects have been used to retrieve custom app setting:
  + AppMenuItems: To retrieve app name
  + SetupEntityAccess & PermissionSet: To find out whether an app is visible to a profile 
We didn't find any field that has this info whether an app is a default app for a particular profile or not .
Query: Any idea which object would have this info?
Any pointer around this would be helpful. 

Thanks in advance !