Paid to download again

I had this app on my old phone, paid for $9.99 for it. I deleted it because it was taking up room and I wasnt using it. Downloaded it again and I had to pay again! And it wont let me enter in my start weight and it glitchy. Was very useful my first time around with it. Looks like it will not be useful my second time

JaHuLi about hCG Diet app, v5.1