Having multiple apps in your dashboard is possible and helpful when you have different environments, such as staging and production environments. You can analyse the traffic through different dashboard views.
To add a new app to your dashboard click in My Organizations
Once in My Organizations page, click in Apps, and New app
Finally, name your app and select an SDK for it.
Please take into account that the number of Apps you're allowed to create depends on your callstats plan. For any questions please reach out to firstname.lastname@example.org