Best Caller Id Unknown Apps

212+ iOS apps curated and reviewed

4.2 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)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Caller-ID	Free	3.7★ (19K)	No	Yes	Sep 2026
2	Traceback: Reveal No Caller ID	Free	4.6★ (29)	Yes	Yes	Sep 2026
3	CallerID: True Number Search	Free	4.2★ (75)	No	Yes	Sep 2026
4	Real Caller : Caller id	Free	4.1★ (3.3K)	Yes	Yes	Sep 2026
5	Show Caller ID & Spam Blocker	Free	4.1★ (306)	Yes	Yes	Sep 2026
6	Caller ID - Spam Call Blocker	Free	4.2★ (188)	Yes	Yes	Sep 2026
7	Caller True ID & Find Number	Free	5.0★ (2)	Yes	Yes	Aug 2026
8	Truecaller - Caller ID & Block	Free	2.0★ (4)	Yes	Yes	Sep 2026

Top Picks for Caller Id Unknown

#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

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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

#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

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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.

#3

CallerID: True Number Search by Stephen Kuyper

Reverse Search & Spam Blocker

Worth Considering

🔧 Utilities

4.2(75 ratings)

FreeIn-App Purchases

CallerID: True Number Search screenshot 1

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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

Real Caller : Caller id

Real Caller : Caller id

Real Caller : Caller id

Number Lookup - Phone Numbers

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

Show Caller ID & Spam Blocker

Show Caller ID & Spam Blocker

Show Caller ID & Spam Blocker

Always Know who's calling

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

free with in-app purchases

Caller ID - Spam Call Blocker

Caller ID - Spam Call Blocker

Caller ID - Spam Call Blocker

Identify unknown calls & spam

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

free with in-app purchases

Caller True ID & Find Number

Caller True ID & Find Number

Caller True ID & Find Number

Identify Callers, Find Numbers

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

free with in-app purchases

Truecaller - Caller ID & Block

Truecaller - Caller ID & Block

Truecaller - Caller ID & Block

Spam & Scam Phone Call Blocker

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

free with in-app purchases

iCaughtYou: Reveal Caller ID

iCaughtYou: Reveal Caller ID

iCaughtYou: Reveal Caller ID

See who’s behind blocked calls

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

free with in-app purchases

Show Caller Name & Block Spam

Show Caller Name & Block Spam

Show Caller Name & Block Spam

Know whos calling Scam blocker

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

free with in-app purchases

Number Finder Caller ID :True

Number Finder Caller ID :True

Number Finder Caller ID :True

Reverse Phone Book Lookup Box

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

free with in-app purchases

Caller App : Caller ID & Block

Caller App : Caller ID & Block

Caller App : Caller ID & Block

Identify unknown calls & spam

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

free with in-app purchases

ViewCaller: Caller ID

ViewCaller: Caller ID

ViewCaller: Caller ID

Identify unknown calls & spam

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

free with in-app purchases

Phone Call - Caller ID

Phone Call - Caller ID

Phone Call - Caller ID

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

Spam Blocker for Unknown Calls

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

NumberBox:CallerID

NumberBox:CallerID

NumberBox:CallerID

Know Your Caller

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

TrapCall: Reveal No Caller ID

TrapCall: Reveal No Caller ID

TrapCall: Reveal No Caller ID

Control Who Calls You & Block

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

free with in-app purchases

Reveal No Caller ID – MaskOff

Reveal No Caller ID – MaskOff

Reveal No Caller ID – MaskOff

Unmask & trap a blocked call

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

free with in-app purchases

True ID Caller - Number Finder

True ID Caller - Number Finder

True ID Caller - Number Finder

Spam Blocker & Phone Lookup

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

free with in-app purchases

True CallerID: Spam Blocker

True CallerID: Spam Blocker

True CallerID: Spam Blocker

Identify unknown calls & spam

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

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.

Are there free caller id unknown apps for iPhone?

Yes — 20 of the top caller id unknown apps we rank are free to download, including Caller-ID and Traceback: Reveal No Caller ID.

Does Caller-ID have ads or in-app purchases?

Caller-ID has no ads and offers in-app purchases, according to its App Store listing as of August 2026.

How many caller id unknown apps are on the App Store?

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.

What does the Caller-ID app do?

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.

What are the key features of the Caller-ID app?

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.