Hi! Today I found this app to make Timelapses that is also reduced from €19.99 to €1.99 in its IAP for a once time payment. It is capable of simultaneously using all the iPhone's cameras and has extensive configuration and a very neat GUI.
I am using Lire as client in iOS and Mac: http://lireapp.com
I am using Lire as client in iOS and Mac: http://lireapp.com