Here is a simple comparison among mobile instant messenger clients on Android, featuring the popular Whatsapp to the less-known KakaoTalk. The reason for their popularity is simple: Convenience. They use your mobile number as user id and automatically add your contacts if they have installed the same app.
Please bear in mind that this comparison does not consider impact on battery life, user interface presentation, server downtime, and other factors that might be the nail in the coffin for you.
Update (20 Mar 2013): I found that Line is causing severe impact on battery life.
| Whatsapp | Viber | Line | KakaoTalk |
| Features |
|
|
|
|
| UI colour | Grey | Purple-white | Bluish Grey-white | Yellow-brown |
| Origin | US | Cyprus | Japan | Korea |
| License | Free for 1st year
(USD 0.99/year, but I get free extensions twice) | Free | Free | Free |
| Verification | SMS | SMS | SMS | SMS |
| Requires
user name? | ✓ | ✗ | ✓ | ✓ |
| Free message | ✓ | ✓ | ✓ | ✓ |
| Free voice call | ✗ | ✓ | ✓ | ✓ |
| Free video call | ✗ | ✗ | ✗ | ✗ |
| Popularity
(based on my friends lists) | 1
(Most popular) | 2 | 3 | 4 |
| Message attachment |
- Gallery
- Camera
- Video
- Audio
- Location
- Contact
|
|
- Gallery
- Camera
- Video
- Audio
- Location
- Contact
|
- Gallery
- Camera
- Audio
- Location
- Contact
- Schedule
- Vote
|
| Emoji |
Extended |
Basic |
Limited |
Basic |
| Emoticons |
✗ |
✗ |
✓ |
✗ |
| Advanced emoticons/ stickers |
✗ |
✓
(limited) | ✓ |
✓ |
| Celebrity accounts |
✗ |
✗ |
✓
(Official Accounts, could select different countries) | ✓
(Plus Friends, mostly K-Pop) |
| More on features |
✗ |
✗ |
- Home page
- Timeline
- Official Accounts include business entities
- Variety of games and tools add-on
- Sticker shop
|
- Unlimited friends in group chat
- Schedule with reminders
- Custom themes
- Voice filters
- Variety of games and tools add-on
- Item Store
|