KakaoTalk is a phone number based messenger service that allows iPhone and android users anywhere in the world to chat one-to-one or in a group for free.
Message arrivals are instantly notified with Push Alert and you can send various multimedia such as pictures, videos, and contact telephone number.
Enjoy KakaoTalk with your friends, colleagues, and family and experience the world of multimedia chatting.

-Main Features of KakaoTalk –

* Free one-to-one or group chats anywhere in the world
With KakaoTalk, you can enjoy free chats with friends not only in your own country but also overseas. Using KakaoTalk , you can chat one-to-one or in a group. Also, you can send various multimedia such as pictures, videos, and contact telephone number (KakaoTalk is available at WIFI or 3G network).

* Multimedia Chat
Texting is just a start! You can send pictures and videos from your album or right after taking them. You can also send phone numbers from your contacts and can save them you have received from your friends.

* Registering Friends Automatically
You don’t need to manually invite chatting friends as KakaoTalk users in your contacts are automatically registerd as your friends.

* KakaoTalk requires no membership registration or log-in
You can start using KakaoTalk right after installing the application without a membership registration or logging in.

* Friends?
You may find friends that you have lost contact with. KakaoTalk recommends friends that you might know based on your relations hip with your friends.

* Find Friends
Even if you do not know your friends’ phone numbers, you can add them to your Friends by just knowing their ID.

Pros

1. You can all friends by using just “User ID” hence you can easily use this app for social networking that does do not need to be people who have your mobile number
2. You can call your friends from this application but calling charges apply
3. Voice recording is crisp & clear, can easily send voice recording just like a photo call and you can play back any recording! No noticeable delays
4. You can save the photograph sent by others to you easily!
5. Emotion icons! There’s a set of emotion icons for you to use!
6. Android users can also communicate with iPhone users
7. Very quick & snappy just like WhatsApp but free!
8. The background wallpaper are different for every “chat room” hence you can set a different photo for each conversation
9. It’s great that you can block people as you can’t stop people from adding you once they have your mobile number of “User ID” this makes it more social

Cons

1. There’s a limit on how long a video can be sent (20 seconds) and a total of 40 seconds of voice recording
2. It’s too similar to WhatsApp, should be like CloudTalk have communities to form their own social network groups
3. Lacking the feature to send your current location on a map
4. There’s no broadcast features for people to say Merry Christmas & Happy New Year to Everyone in a single message without being bombarded by the group “chat room”