"the app detects other devices with AarogyaSetu installed"
Only if BlueTooth is enabled, I'll wager.
I only enable BlueTooth when I'm in my car to get hands-free communications, so it won't work. And if you think I'm going to enable BlueTooth just because I'm leaving my house, think again.
I've been quarantined for three weeks already, this is going to be my 4th. I don't have the bug, and I'm not meeting anyone so I still don't have the bug.
I don't need the app and I won't install it.