Unfortunately, we are not able to test or support apps that do not ship with Blackphone 2. We do test and verify all apps recommended in the Silent Store.
You may choose to add other apps at your discretion, but Blackphone does not endorse or provide support for any third-party app store. For users who opt to install a third-party apps, Blackphone strongly encourages that such installations be done only in a Personal space. This helps to maintain privacy and security of the apps and data in other Spaces. To find out more about Spaces and how to create a Personal space, visit these pages. We also strongly recommend you make use of the Blackphone Security Center to manage permissions for any apps you might install prior to first using them. Remember that you are exercising your own choice and control, so being aware of what external apps are trying to do is an important task for Blackphone users!