QR Code Counter

Hi Experts,
Need one suggestion - there community election and as active member I need to do it digitally . there is 1000 members and 7 candidate nominated for one post. we are going to use it ballot paper where all members listed on that paper and members need to check mark his / her vote for his candidate. I searching for machnisam like say assing QR code for each candidate and we just need to scan the code and declar result . for qr code I know free websites but I don't know how do I count this ballot and display result ...is there any app available for this type of counter ? our community is non profit making organization so I do this voluntary.