Keep crashing dont know why

I emailed the support few times without answers, but it crashed when you try to put the sounds or if you open on your iphone it crashed on your ipad. I keep using it so far as i didnt pay for any other aps, i just hope developper will update it soon as last time was in 2015.

We want less price about Foscam Pro: Multi IP Camera Viewer, v3.911