whowho - Caller ID & Block

★★★★★ Fantastic app that really proves useful in Korea. It really filters out the riffraff and helps me block unwanted spam. I hope to see this in other countries!

★★★★★ Mamy nice features. A little less clear how to green light previously flagged numbers, e.g. kt english service gets all kinds of warnings, but I really wanted to talk to them and they were legit!

★★★★★ Great app. It has prevented me from picking up spam numbers that my caller ID didn't catch. Very nice.

★★☆☆☆ It was already installed on my new Samsung phone. Right after I enabled it by following instructions, granting access to my phone's contacts, microphone, usb storage, ... it sent an installation message to my contacts, and installed itself on my contact's phone. It behaves like a malware. Also, it is popping up advertisements on my screen. I did not have time to experience if this app is useful or not. I am uninstalling this right away due to obvious security issue and lack of privacy respect. Bye bye.

★★☆☆☆ It always asks 'appear on top' Then it always shows stupid ads 'on top' I'll just get rid of stupid app a.s.a.p.

★★☆☆☆ UI looks horrible and cluttered, and only 1/4th of the app is translated (it would literally cost less than 10만원 to get these simple words and sentences translated) but I'm interested in the features, so I'm reserving judgment for now. Off to a bad start though.

★★☆☆☆ Someone else mentioned how this behaves like malware. It's slow, buggy, and full of ads My battery improved after uninstalling this app

★★☆☆☆ Adware. It inserts ads in message. Also, constant crash. Freeze. Spam block doesn't work well.