Looking for a specific task app topic

Is there an app, that combines the capability to show and synchronize tasks, both google tasks and exchange account together?
There are many different apps who provides a solutions for one or the other. But i haven't found yet an app, that combines both.
Just let me clarify, both accounts are already on the phone, and i am able to show it together in apps like Business Calender 2.0, but just the calenders.