Who - Caller ID, Spam Block

In-app purchases
3.5
16.9K reviews
1M+
Downloads
Content rating
Everyone
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About this app

WHO is the world’s best Caller ID, spam blocking app. Manage all your calls and messages quickly, by filtering out telemarketers, robocalls and other unwanted disturbances. With a community-based spam list updated by millions of users worldwide, WHO is the only app you need to make your communication safe and efficient.

WHO is the trusted source for people search, phone numbers, reverse phone lookup and background checks that include public records.

TRUE CALLER IDENTIFICATION - CALLER ID
✅ The world’s best Caller ID will identify anyone calling you
✅ You can identify the calls you receive from numbers that do not exist in your Contacts
✅ Get alerts instantly if you get an unwanted call. So that you get real-time protection from robocalls, telemarketers and scam calls.

THE BEST SPAM DETECTION & BLOCK - ROBOKILLER
✅ Detect Robocalls, Telemarketer, Fraud and Scam calls.
✅ Community based spam call reporting in real time
✅ Spam call blocker - get notified before you answer if the number is a spammer

PEOPLE SEARCH & BACKGROUND CHECKS
✅ Find people and look up phone numbers, including mobile numbers, addresses, and access background check reports with ease
✅ Find college friends, distant relatives, coworkers, or others with whom you have lost touch or wish to reconnect with someone from your past
✅ All background check searches are confidential and powered by many different sources, the fastest way to search, find and know about people in your world

MANAGE YOUR PHONE CONTACTS
✅ Add names and addresses from WHO to your phone book contacts to keep them accurate, complete, and current.
✅ See your contacts within WHO and lookup whether your contacts have another phone number.

REVERSE PHONE LOOKUP, CALLER ID, ADDRESS SEARCH & EMAIL LOOKUP
✅ Identify who is calling, including spam calls, in seconds with one-click search from your call log or easily look up a number
✅ Use reverse phone lookup to find out who owns a phone number and get their background report including address and other public records
✅ Use email search to find out who owns an email address and identify spam and phishing emails

YELLOW PAGES
✅ Find businesses around you and get phone numbers, directions and business hours

JUST SOME OF THE WAYS YOU CAN USE THE WHO APP:
✅ Identify unknown callers and suspicious texts in seconds with reverse phone lookup
✅ Need a phone number? Lookup phone numbers and addresses for acquaintances, extended family and others
✅ Help keep your family safe - lookup neighbors and others nearby and easily get a background check

WHO PREMIUM - Upgrade and get access to:
✅ No ads
✅ Advanced spam, scam, telemarketer and fraud call protection
✅ Automatic spam database update
✅ See callers' full names that do not exist in your contacts

With over 10 million unique monthly visitors, WHO empowers users with up-to-date, detailed data about people. WHO's proprietary technology organizes 12 billion records to help users reconnect, update lost contact information, potential business prospects, reunite with family and friends. Even more so, WHO enables users to protect themselves from fraud or scammers and discover and monitor their own online footprint.
Updated on
Sep 4, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Personal info
This app may collect these data types
Location, Personal info and 6 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

3.6
16.8K reviews
Vaughn Marran
April 29, 2025
I have tried many tracing methods and paid for apps. But this app gives accurate information. I tested it on my number. In fact, it is a little scary how accurate the information is. The app reveals information about myself that does not appear on Google, Microsoft, and many other platforms. past
33 people found this review helpful
Did you find this helpful?
RD Labs LLC
April 29, 2025
Thank you for your insightful feedback! We're glad the app met your expectations and provided accurate results. We aim to deliver reliable caller ID services while ensuring user privacy. Your experience motivates us to keep improving and innovating responsibly
Jacolien van den Berg
September 4, 2025
Unable to report or block a number from a lying scammer
Did you find this helpful?
RD Labs LLC
September 4, 2025
hello Jacolien van den Berg , could you share more details about the issue, along with a screenshot or recording if possible? and please send this information to info@whoapp.ai and our team will prioritize investigating the matter
A Google user
March 18, 2020
After your free trial, this app is utterly useless, unless you want to subscribe for $13/month. And the trial is over & gone in 3 days (!) ... that's so quick I never even got the chance to try it, not that I really care all that much. If I needed this service that badly I would've already had one for the same price or way less from one of the many companies with good reps that are all over the place online.
42 people found this review helpful
Did you find this helpful?
RD Labs LLC
January 26, 2021
Thank you for providing your valuable feedback. Please reach out to us at whoapppeoplesearch@gmail.com, if you have other suggestions.