If you are looking for a specific feature like "Who Viewed My Profile," that is a server-side feature and by a modded app.

Truecaller is a popular mobile app that provides users with information about unknown numbers, allowing them to identify potential spam calls and decide whether to answer or block them. While the app offers a range of useful features, some users may be interested in exploring additional functionality not available in the standard version. This is where Truecaller Mod for iOS comes in – a modified version of the app that offers extra features and benefits.

How do I report spam from my iPhone call log? - Support : truecaller

: Truecaller now integrates directly into the call screen, identifying callers in real-time as the phone rings.

If a friend or family member has Truecaller Premium, iOS allows sharing App Store subscriptions with up to 5 family members.