whowho - Caller ID & Block Android
whowho - Caller ID & Block is #13 in Communication Grossing on Google Play in South Korea and charting in 1 of 15 countries we track.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperVP (Inc)
CategoryCommunication
PriceFree
Released
Installs10M+
Rating★ 4.1 (260k)
Updated
Content ratingEveryone
Rating
4.1 ★
260k ratings
Measured
Best rank now
#13
Communication GrossingMeasured
whowho - Caller ID & Block on Google Play
App details
App ID
com.ktcs.whowho
Publisher
VP (Inc)
Content rating
Everyone
whowho - Caller ID & Block downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Google Play shows an exact lifetime install count; downloads per day are its daily change (measured). When Play hasn't refreshed the count, they come from new ratings and Top Free chart positions. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
In-app revenue
Worldwide, what users spend in whowho - Caller ID & Block before Apple and Google take their fee.
How this is calculated
Not in an overall Top Grossing chart, only in category charts: each category position is converted to the overall position it corresponds to, then priced on the same rank-to-revenue curve, inside the part of each market the charted apps leave over.
Business model: Ad-led
How whowho - Caller ID & Block makes money: subscriptions, one-off purchases and ads.
In-app purchasesAds
One-off purchases
/mo
of revenue
Ads
/mo
of revenue
Where it ranks on Google Play
Every top 200 chart it appears in across 15 countries.
| Country | Charts | Rank |
|---|---|---|
| South Korea | CommunicationGrossing | #13 |
| South Korea | CommunicationFree | #36 |
Apps near whowho - Caller ID & Block on the chart
Communication Grossing, around #13.
Ratings
Google Play, worldwide.
Rating
4.1 ★
260k ratings
Measured
Ratings
260k
Measured
Written reviews
211
Measured
About whowho - Caller ID & Block
▶대한민국 3천만 이용자가 경험한 국민 전화 앱
1. Get informed on numbers as the calls come in
Choose to reject useless spam, and never miss the calls that matter.
WhoWho tells you all you need to know about unknown numbers in real time
- both the good and the spam.
2. Convenient Number Management
Use your smartphone more efficiently by recording important information,
such as whether numbers are safe or spam.
3. Make Community Reports as One
Share information on unknown numbers with other users,
creating a service that’s helpful to all users.
4. Use WhoWho as your default caller on your smartphone
The app allows you to use frequently dialed numbers faster and with more convenience,
and offers several other functions, including friendliness stats on each contact, memos, schedule management, call recording, and others.
In addition, make use of a variety of convenient widgets, including call logs, frequent contacts, and keypad.
5. Block useless numbers for good!
You can identify bad numbers (spam, voice phishing, etc.) before accepting calls,
and you can completely block useless calls using a variety of blocking options.
! However Starting From Android 4.4(Kitkat), WhoWho will not be able to block text message(SMS, MMS) in accordance with Google’s service policy.
6. WhoWho on Wearables
Use WhoWho on a smart watch by making a simple adjustment to settings.
* WhoWho is a totally free service
* Wireless internet(3G or WiFi) is required for WhoWho to work normally
* Starting From Android 4.4(Kitkat), WhoWho will not be able to block text message(SMS, MMS).
* If you have any questions, please let us know by e-mail : [email protected]
1. Get informed on numbers as the calls come in
Choose to reject useless spam, and never miss the calls that matter.
WhoWho tells you all you need to know about unknown numbers in real time
- both the good and the spam.
2. Convenient Number Management
Use your smartphone more efficiently by recording important information,
such as whether numbers are safe or spam.
3. Make Community Reports as One
Share information on unknown numbers with other users,
creating a service that’s helpful to all users.
4. Use WhoWho as your default caller on your smartphone
The app allows you to use frequently dialed numbers faster and with more convenience,
and offers several other functions, including friendliness stats on each contact, memos, schedule management, call recording, and others.
In addition, make use of a variety of convenient widgets, including call logs, frequent contacts, and keypad.
5. Block useless numbers for good!
You can identify bad numbers (spam, voice phishing, etc.) before accepting calls,
and you can completely block useless calls using a variety of blocking options.
! However Starting From Android 4.4(Kitkat), WhoWho will not be able to block text message(SMS, MMS) in accordance with Google’s service policy.
6. WhoWho on Wearables
Use WhoWho on a smart watch by making a simple adjustment to settings.
* WhoWho is a totally free service
* Wireless internet(3G or WiFi) is required for WhoWho to work normally
* Starting From Android 4.4(Kitkat), WhoWho will not be able to block text message(SMS, MMS).
* If you have any questions, please let us know by e-mail : [email protected]
What's new in 4.27.1
주요 업데이트 사항
ㆍ 앱 사용성과 안정성을 강화하고 버그를 개선했어요.
ㆍ 앱 사용성과 안정성을 강화하고 버그를 개선했어요.