To stay on version 3.6.0, go to the Google Play Store settings and disable automatic updates for the app.
Even as an older build, version 3.6.0 included the core features that made Blued a global success: Secure text, voice, and photo sharing. blued 3.6.0 apk
A grid-based view of users in your immediate vicinity, filtered by your preferences. To stay on version 3