iKnow! is temporarily stopped its service for updating the system and we're not able to use it for a while. It's a little bit inconvenient because I enjoy iKnow! as my routine study for English vocabulary, but I like the displayed picture iKnow! shows while they are closed. Here's another one. They both are so cool, aren't they?

At 14:30, I accessed iKnow. Actually, iKnow! has changed its name of the service and website into smart.fm. (iKnow! remains the name of the study application.) Now I can study with iKnow! again.