At least they're testing
There may be some imperfections in the app, but if they are actually doing the follow-up of testing people who have been in contact, then India is doing way better than France, who has an app but doesn't bother with contact tracing or testing in any managed way.
No, we just get locked down because the infection rate is too high. Well guess what ? If we had bothered to do proper contact tracing and testing, maybe we wouldn't need to be locked down again.