Best Unknown Caller Block Apps

235+ iOS apps curated and reviewed

4.2 avg rating
20 free apps
Updated November 2026

The best unknown caller block apps on iPhone average 4.2★ across 235+ titles — we've ranked them by what real users actually keep on their phones. Updated November 2026.

Compare top Unknown Caller Block Apps (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Hiya: Spam BlockerHiya: Spam BlockerFree4.5★ (238K)NoYesNov 2026
2TrapCall: Reveal No Caller IDTrapCall: Reveal No Caller IDFree4.2★ (26K)NoYesNov 2026
3Truecaller ~ Caller ID & BlockTruecaller ~ Caller ID & BlockFree—YesYesOct 2026
4Caller App : Caller ID & BlockCaller App : Caller ID & BlockFree4.3★ (298)YesYesNov 2026
5T-Mobile Scam ShieldT-Mobile Scam ShieldFree4.7★ (208K)NoNoNov 2026
6Truecaller : Caller ID & BlockTruecaller : Caller ID & BlockFree4.2★ (33)YesYesNov 2026
7True CallerID: Spam BlockerTrue CallerID: Spam BlockerFree4.4★ (316)NoYesNov 2026
8BlackList: caller ID & blockerBlackList: caller ID & blockerFree2.7★ (71)NoYesOct 2026

Top Picks for Unknown Caller Block

Hiya: Spam Blocker#1

Hiya: Spam Blocker by Hiya

AI fraud & spam protection
Editor's Choice
🔧 Utilities
4.5😐(238K ratings)
FreeIn-App Purchases
Hiya: Spam Blocker screenshot 1
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Hiya: Spam Blocker screenshot 6

Identify unknown callers and block unwanted calls with AI-powered protection. Screen calls before answering, look up suspicious numbers, and receive alerts for AI-generated voices or risky requests. Enhance your phone's security and reduce spam.

What We Love

  • 🚀 Blocks spam calls
  • 👍 Useful for identifying scam/fraud numbers
  • 🔒 Provides security against unwanted calls
  • 🤖 Reduces number of robocalls

Room to Improve

  • 🐛 Inconsistent performance, sometimes lets spam through
  • 💰 Paid subscription required for full functionality
  • 🔍 Lookup feature not always accurate
  • 🕰️ Requires manual reporting of spam numbers
TrapCall: Reveal No Caller ID#2

TrapCall: Reveal No Caller ID by Mosaic S.r.l.

Control Who Calls You & Block
Strong Contender
💼 Business
4.2😞(26K ratings)
FreeIn-App Purchases
#26in Business
TrapCall: Reveal No Caller ID screenshot 1
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Unmask blocked and unknown callers, stop spam, and protect your privacy. Get caller ID for masked numbers, record calls, and receive voicemails as text. This app provides a solution for unwanted and harassing calls.

What We Love

  • 🔒 Effective in unmasking blocked numbers
  • 🚀 Able to record and transcribe calls
  • 👍 Helpful in gathering evidence for legal issues

Room to Improve

  • 🐛 Inaccurate caller ID information
  • 🔒 Difficult to fully deactivate and remove from device
  • 🔋 Continued call forwarding even after cancellation
  • 👎 Poor customer support and lack of communication

More Unknown Caller Block apps to explore

FAQ about Unknown Caller Block

What are the best unknown caller block apps for iPhone?
Hiya: Spam Blocker tops our unknown caller block apps ranking as of November 2026, with a 4.5-star average from 238K App Store ratings, and it's free to download.
Yes — 20 of the top unknown caller block apps we rank are free to download, including Hiya: Spam Blocker and TrapCall: Reveal No Caller ID.
Hiya: Spam Blocker has no ads and offers in-app purchases, according to its App Store listing as of November 2026.
We track 235+ unknown caller block apps on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.