I installed Kobo reader without any problems on 3 devices.
I could not try Baby Names as there are at least 4 of them with this precise name and 2 dozens variations including Baby Names!
The most likely reason you don't have enough memory.
The best way to find out is to install adb:
https://www.mobileread.com/forums/sho...d.php?t=141833
posts #25 and 38
and post logcat over here.