Why the Google account? What do you mean by that? Email account?
A method of registering with the service asks for Google/Gmail access to get contacts and email history (this might have changed since I tried it). The same way it gathers the contacts and call logs in your phone and SMS. So its one thing if you got it... but imagine an agency or SP using it and keeping a John's contact and leaking all that to the truecaller servers.
Of course, if you don't care about privacy/security you got nothing to stress about. But with the increase in voice phishing (maliciously gathering voice samples) and the advancement of AI... won't be long before people start getting phone calls from an AI powered conversation impersonating friends and relatives to extort some form of payment. Who knows, this could also be used to bypass voice recognition security systems being developped for banking.
... TikTok is even worst.
Sources:
The true colours of Truecaller in India: app accused of being negligent about data privacy · Global Voices
According to recently published research, the popular app TrueCaller is plagued with constant breaches and data security failures, and the company is avoiding regulations and taxes in India.
globalvoices.org
Spammed if you do, spammed if you don't: is Truecaller putting your privacy at risk? | TechRadar
New report slams popular spam call-blocking's privacy policy
www.techradar.com
What exactly does Truecaller do with your data? A hacker’s deep dive
Due to privacy concerns with call app Truecaller, @0xRogue — a developer and hacker — analyses the risky journey your data takes from your phone to Stockholm, Sweden, to Mountain View, California, USA and possibly other places
techpoint.africa
Innovation in Banking Sector with Voice Banking and Speech Technology | OpenGrowth
Read OpenGrowth's exclusive articles to enrich your knowledge on top trending topics across top trending industries, all in one platform.
www.opengrowth.com