Kami Apuri: Criminal Hunter

Sou Karaito, a young man with a strong sense of justice, is an ordinary college student by day. However, secretly, he works as a "criminal hunter," wielding a smartphone equipped with a mysterious app that allows him to become either a god or a devil, hunting down heinous criminals one after another. Just who is he? The hunt to expose and judge everyone begins now!

(Source: Akita Shoten, translated)