Hi,
Thank you very much for the bug report.
I can not reproduce, but I think that it is not the android version and model problem.
The version is slightly old, but GrouPhone can normally start it in Nexus5 Android5.1.
She has registered numerous contacts and photos?
It's developing on the memory at the time of a start of GrouPhone to improve the drawing speed of the contacts list.
I think this is wrong
Perhaps not enough memory, the exception is expected to occur.
So, I fixed to load only the screen during rendering.
Version 1.08 has been released.
Please use this version 1.08.
When there is something, please contact me. It'll correspond immediately.
Thank you.