Truecaller is one of the world's most widely used caller identification applications, boasting over 300 million active users. Its core utility lies in identifying unknown numbers, blocking spam calls, and providing a centralized directory for contact information. To monetize this service, Truecaller employs a tiered subscription model—Truecaller Premium and Gold—which unlocks features such as an ad-free experience, the ability to view who visited the user’s profile (Incognito mode), and increased contact request quotas.