I find TrueCaller immensely useful. Especially to filter out and block spam callers. Spam calls and robocalls are a HUGE problem in India. TrueCaller flashes spam callers in red, you can reject the call and save a few precious minutes of your life. About half of the calls I receive a day are spam calls. If I were to answer them all and then reject it would be a waste of time and energy.
I used to use Truecaller, and it is useful, but it got gradually more and more obnoxious over the years, until eventually it would nag you about paid subscriptions whenever you opened the app, and throw up fullscreen ads whenever you received a phone call. So at that point I uninstalled it.
Most of these are not scammers trying to scare in the name of tax authorities or IT support scammers. They are mostly tele-callers trying to sell property, insurance, loans, credit cards and such. Nuisance nonetheless.
A cabinet minister (secretary in US administration) got a call like this out of the blue. That is when the India govt work up to the problem. Nothing was done so far though,
