Disappointed- app wont work - waiting on a refund

I downloaded this app because I was super excited about having a Vegan food guide & after agreeing to pay for it and downloading it I received an error upon opening it that wouldnt let me open the app. I contacted the creator of this app and he told me that he didnt have any other issues with other users & to try deleting, rebooting & downloading again. I had the same results, so he told me to request a refund from iTunes support. I dont think its my phone as Ive not had any other issues with other apps Ive downloaded. Im disappointed that I cant use this app, and the response from the creator has implied that its either my phone or user error thats causing this lack of functionality.

AngieBeatty about VeganXpress - Menu & Shopping Assistance, v3.1