Glitchy - why is it taking so long to fix!!!

The content is great but the app itself is riddled with glitches and doesnt work properly on my iPhone 6.
Often it will just randomly close when Ive selected a photo archive or article that Id like to read. Its really disappointing because I really enjoy the content, hopefully they can put out an update ASAP.

Anglo2014 about Discovery News, v2.1.1