Jordan Morgan has negotiated open-sourcing of his Spend Stack app. Source code of this app might be used for multiple features – CloudKit integration, animations and transitions.
There are several restrictions on reusing Spend Stack source code and naming, check the blog post for possible usages.
Code is mostly Objective-C, however, could be still relevant.
Reference: Spend Stack is Now Open Source
Developer:Check the source code, consider reusing on consulting the code on CloudKit features, custom transitions.
QA engineer:Business as usual.
PM/DM:Business as usual.