Never download APKs from outside the official app store. The "free premium" feature isn't free—it's your privacy and security.
The real Blued 3.7.0 (when officially released) added security patches. The fake one added only regret.
He checked his app permissions. The fake Blued 3.7.0 had access to his contacts, his camera, and—newly added—his SMS and notification read history. While he enjoyed free stickers and invisible mode, the APK was silently reading his two-factor authentication texts and using his account to spam malware links to everyone he knew.
On the fourth night, his phone behaved strangely. The battery drained from 80% to 15% in two hours. Then his friend on Blued messaged: "Why did you send me that weird link to a crypto site?" Arjun hadn't sent anything.