The best alternatives to Truecaller are Hello, Callblock, and Bad Numbers. If these 3 options don't work for you, we've listed a few more alternatives below.
Callblock is the first app that lets you stop telemarketing phone calls in iOS (https://techcrunch.com/2016/09/07/callblocks-new-ios-app-will-block-calls-from-over-2-million-telemarketers/
Truecaller's iPhone app has been completely re-written from the ground up to be lighter, more efficient, but most important of all, 10 times better spam, scam and business call identification compared to previo...
RoboStopper is a cross-platform app that blocks all unwanted phone calls, with an optional bypass rate that spammers must pay. No foolhardy blacklists, and more flexibility than iOS’s Silence Unknown Callers so...
Sparkbook is a smart phonebook that sparks rich personal or business relationships. The app gives you a social check-up, focusing you on a few people at a time that you're losing touch with. Shuffle your favori...