Sorry to be the bearer of bad news.....
Windows phone is now on it's last legs, not saying MS won't come back with mobile devices that run full blown Windows using Cshell, and I really hope they do, but on the Windows mobile specific apps it's the long road down hill called retrenchment.
I will continue using my 950XL with the apps that I now have, till it either dies or I can replace it with something new from MS, but if you want apps on a mobile phone, Android or Apple are your alternatives.