Best Caller Id Unknown Apps

212+ iOS apps curated and reviewed

4.1 avg rating
20 free apps
Updated August 2026

From beginner-friendly picks to power-user tools, our caller id unknown list covers 212+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.

Compare top Caller Id Unknown Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Caller-IDCaller-IDFree3.7★ (19K)NoYesAug 2026
2Traceback: Reveal No Caller IDTraceback: Reveal No Caller IDFree4.6★ (29)YesYesAug 2026
3CallerID: True Number SearchCallerID: True Number SearchFree4.1★ (68)NoYesAug 2026
4Real Caller : Caller idReal Caller : Caller idFree4.1★ (3.3K)YesYesAug 2026
5Show Caller ID & Spam BlockerShow Caller ID & Spam BlockerFree4.1★ (306)YesYesAug 2026
6Caller ID - Spam Call BlockerCaller ID - Spam Call BlockerFree4.2★ (188)YesYesAug 2026
7Caller True ID & Find NumberCaller True ID & Find NumberFree5.0★ (2)YesYesJul 2026
8Truecaller - Caller ID & BlockTruecaller - Caller ID & BlockFree2.0★ (4)YesYesAug 2026

Top Picks for Caller Id Unknown

Caller-ID#1

Caller-ID by Greenflight Venture Corporation

Reverse Phone Lookup
Editor's Choice
🔍 Reference
3.7😞(19K ratings)
FreeIn-App Purchases
Caller-ID screenshot 1
Caller-ID screenshot 2
Caller-ID screenshot 3
Caller-ID screenshot 4
Caller-ID screenshot 5
Caller-ID screenshot 6

Identify unknown callers and find out who owns a phone number. This app offers a global reverse lookup for over 1 billion numbers, with features like geolocation and social media directory integration. It also allows users to report and comment on spam or prank callers.

What We Love

  • 💯 Accurate caller identification
  • 🔍 Helpful for screening calls
  • 🔍 Useful for finding unknown numbers

Room to Improve

  • 🐛 Doesn't work consistently
  • 🔍 Limited information provided
  • 💰 Misleading about free features
Traceback: Reveal No Caller ID#2

Traceback: Reveal No Caller ID by Mord & Co LLC

Unmask Private Calls Instantly
Strong Contender
💼 Business
4.6(29 ratings)
FreeAdsIn-App Purchases
Traceback: Reveal No Caller ID screenshot 1
Traceback: Reveal No Caller ID screenshot 2
Traceback: Reveal No Caller ID screenshot 3
Traceback: Reveal No Caller ID screenshot 4
Traceback: Reveal No Caller ID screenshot 5
Traceback: Reveal No Caller ID screenshot 6

Instantly unmask the identity of unknown and "No Caller ID" calls. Receive real-time notifications with caller details and generate police-ready evidence reports for enhanced safety and peace of mind.

CallerID: True Number Search#3

CallerID: True Number Search by Stephen Kuyper

Identify unknown calls & spam
Worth Considering
🔧 Utilities
4.1(68 ratings)
FreeIn-App Purchases
CallerID: True Number Search screenshot 1
CallerID: True Number Search screenshot 2
CallerID: True Number Search screenshot 3
CallerID: True Number Search screenshot 4
CallerID: True Number Search screenshot 5
CallerID: True Number Search screenshot 6

Instantly identify unknown callers and block spam, scams, and robocalls. This app offers reverse number lookup, SMS spam protection, and customizable blacklists for enhanced phone security and privacy.

More Caller Id Unknown apps to explore

4
Real Caller : Caller id
Real Caller : Caller id
Real Caller : Caller id
Number Lookup - Phone Numbers
Free

This app allows users to create profiles, search for others, and block unwanted calls. It also offers instant messaging between users and allows you to add multiple names to your verified phone number for easier identification. Premium features are available through subscription.

Create and manage user profilesSearch for other users' profilesBlock unwanted phone calls
🔧 Utilities
(3.3K)
freemium
5
Show Caller ID & Spam Blocker
Show Caller ID & Spam Blocker
Show Caller ID & Spam Blocker
Always Know who's calling
Free

Identify unknown callers and block spam with a vast database of phone numbers. Get contact photos and use a smart dialer for quick access. Take control of your calls and contacts.

Caller ID Name identificationSpam identifierReverse phone number lookup
🔧 Utilities
(306)
free with in-app purchases
6
Caller ID - Spam Call Blocker
Caller ID - Spam Call Blocker
Caller ID - Spam Call Blocker
Identify unknown calls & spam
Free

Instantly identify unknown callers and block unwanted spam calls with advanced real-time identification and community-powered protection. Take control of your calls and enjoy a safer communication experience.

Real-time caller identificationAutomatic spam call blockingCommunity-powered protection
💼 Business
(188)
free with in-app purchases
7
Caller True ID & Find Number
Caller True ID & Find Number
Caller True ID & Find Number
Identify Callers, Find Numbers
Free

Identify unknown callers and search phone numbers with a clear interface. Get quick access to caller information and look up numbers to understand who is contacting you. Convenient tools help you manage contacts and review incoming calls easily.

Identify unknown callersSearch phone numbersView caller information
📊 Productivity
(2)
free with in-app purchases
8
Truecaller - Caller ID & Block
Truecaller - Caller ID & Block
Truecaller - Caller ID & Block
Spam & Scam Phone Call Blocker
Free

Identify unknown callers, block spam and scam calls, and filter unwanted SMS messages. This app provides real-time spam protection and smart contact management for safer, more organized communication.

Identify unknown callersBlock spam and scam callsFilter unwanted SMS
🔧 Utilities
(4)
free with in-app purchases
9
iCaughtYou: Reveal Caller ID
iCaughtYou: Reveal Caller ID
iCaughtYou: Reveal Caller ID
See who’s behind blocked calls
Free

Instantly identify unknown and private callers to protect your privacy and peace of mind. This app reveals hidden numbers, records important calls, and blocks unwanted contacts, all within a single, easy-to-use interface.

Reveal No Caller ID, Private, and Unknown callersRecord incoming and outgoing callsSee registered caller names
🔧 Utilities
(90)
free with in-app purchases
10
Show Caller Name & Block Spam
Show Caller Name & Block Spam
Show Caller Name & Block Spam
Know whos calling Scam blocker
Free

Identify unknown callers and block spam calls with real-time caller ID. Search any number to find the caller's name, identity, and even photos. This app also offers smart contact management and offline functionality.

Real ID Caller NameSpam and fraud call protectionPhone number identification
🔧 Utilities
(136)
free with in-app purchases
11
Number Finder Caller ID :True
Number Finder Caller ID :True
Number Finder Caller ID :True
Reverse Phone Book Lookup Box
Free

Identify unknown callers and protect your privacy with this comprehensive reverse phone lookup tool. See who searched for your number, block spam, and manage your digital footprint. Stay safe and informed about who contacts you.

Unlimited reverse phone lookupsReal-time caller ID identificationComprehensive spam detection
🔧 Utilities
(70K)
free with in-app purchases
12
Caller App : Caller ID & Block
Caller App : Caller ID & Block
Caller App : Caller ID & Block
Identify unknown calls & spam
Free

Identify unknown callers and block unwanted spam calls. This app functions as a caller ID, dialer, and SMS manager, helping you screen calls and texts. It also offers call reminders and a phone number search feature.

Full Screen Caller IDT9 DialerSMS & Messaging
🔧 Utilities
(295)
free with in-app purchases
13
ViewCaller: Caller ID
ViewCaller: Caller ID
ViewCaller: Caller ID
Identify unknown calls & spam
Free

Identify unknown callers and block unwanted spam calls with real-time detection. Access a global database to screen calls and manage your communication for enhanced privacy and security.

Real-time spam detectionGlobal community insightCustomizable blocking
🔧 Utilities
(765)
free with in-app purchases
14
Phone Call - Caller ID
Phone Call - Caller ID
Phone Call - Caller ID
Phone Call
Free

Identify unknown callers and block unwanted calls with this powerful tool. It functions as a phone number lookup, spam blocker, and smart dialer, helping you see the true caller ID and region for every incoming call. Over 30 million users trust it to screen their calls.

Instant Caller ID identificationPhone number lookupSpam and unwanted call blocking
🔧 Utilities
(5)
ad-supported
15
Easy Caller ID
Easy Caller ID
Easy Caller ID
Spam Blocker for Unknown Calls
Free

Identify unknown callers and block spam calls with real-time information displayed on your native call screen. Instantly look up any phone number to find caller details and enrich your address book. Your privacy is protected, and all features are completely free.

Instant caller identificationReal-time call screen displayPowerful spam call blocking
📊 Productivity
(2.7K)
free
16
NumberBox:CallerID
NumberBox:CallerID
NumberBox:CallerID
Know Your Caller
Free

This app helps you identify unwanted calls by allowing users to report and tag spam or telemarketing numbers. All submissions are anonymous and help build a community-driven database to protect users from potential scams.

Voluntarily report unwanted numbersManually add tags to phone numbersIdentify spam and telemarketing calls
🔧 Utilities
(465)
free
17
TrapCall: Reveal No Caller ID
TrapCall: Reveal No Caller ID
TrapCall: Reveal No Caller ID
Control Who Calls You & Block
Free

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.

Reveal masked caller IDsBlock spam and telemarketersRecord incoming calls
💼 Business
(25K)
free with in-app purchases
18
Reveal No Caller ID – MaskOff
Reveal No Caller ID – MaskOff
Reveal No Caller ID – MaskOff
Unmask & trap a blocked call
Free

Identify and record unknown or blocked callers. This app provides instant proof of who is calling, allowing you to gather evidence against harassers and stop unwanted calls. It offers a secure record of all communications.

Reveal hidden caller IDsRecord callsCollect evidence against harassers
💼 Business
(523)
free with in-app purchases
19
True ID Caller - Number Finder
True ID Caller - Number Finder
True ID Caller - Number Finder
Spam Blocker & Phone Lookup
Free

Identify unknown callers before you answer and block unwanted spam and scam calls. This app offers a reverse phone lookup to find caller details and provides smart call protection worldwide. It features a clean interface for daily, reliable caller identification.

Real-time caller IDAutomatic spam blockerReverse phone lookup
🔧 Utilities
(44)
free with in-app purchases
20
True CallerID: Spam Blocker
True CallerID: Spam Blocker
True CallerID: Spam Blocker
Identify unknown calls & spam
Free

Identify unknown callers and block unwanted calls automatically. This app uses smart spam detection and AI to protect you from robocalls, telemarketers, and scams. Take control of your phone and see caller information before you answer.

Instant Caller IDSmart Call BlockerSpam Detection Alerts
🔧 Utilities
(256)
free with in-app purchases

FAQ about Caller Id Unknown

What are the best caller id unknown apps for iPhone?
Caller-ID tops our caller id unknown apps ranking as of August 2026, with a 3.7-star average from 19K App Store ratings, and it's free to download.
Yes — 20 of the top caller id unknown apps we rank are free to download, including Caller-ID and Traceback: Reveal No Caller ID.
Caller-ID has no ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 212+ caller id unknown apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This app provides a reverse phone lookup service to help you identify who owns a phone number. It allows you to search over 1 billion phone numbers worldwide and find out the name associated with a number that has contacted you.
Key features include a global caller ID search for over 1 billion numbers, maps geolocation to show the approximate area by area code, a social media directory to find users on platforms like Facebook and Twitter, and crowdsourced voting and comments on spam numbers.