Problems with program – HP Prime Pro Review

I have an iPhone 5S and whenever I try to go to the Settings menu for the Home view the program shuts down. I also noticed issues in other areas of my 5S such as non-responsiveness to taps on various icons. This problem went away when I deleted HP Prime and rebooted my phone. Might consider re-installing HP Prime after a couple of updates have been issued. As of now I feel I wasted $6. Updated 4/28/16: I updated my OS to iOS 9.3.1 and the program is working much better Update 7/29/16: Continue to experience unexplained crashes when using both the Geometry app (see my 7/27/16 review) and now the Spreadsheet app. This program definitely needs an update. Update 9/29/16: Found another bug: the catalog function "shift_phase" doesn't work on my iPhone. It does work properly in the virtual version of the Prime on my PC.
Review by srochman-sd on HP Prime Pro.