Voting presents uniquely difficult challenges, you need integrity, strong authentication, verifiability, and anonymization. As others have stated, this particu

Voting presents uniquely difficult challenges, you need integrity, strong authentication, verifiability, and anonymization. As others have stated, this particular scheme's weakness to tampering lies at the receiving end of the app's server. There are other privacy problems with the "send a selfie" of the on-duty soldiers I won't get in to. But ultimately, voting has unique constraints. The voter needs to be able to verify their vote was counted correctly, outside observers need to be able to verify totals, but not identify individual votes, and the whole system needs assurances only those who are supposed to vote, do so.