Pretty good

Simple and effective! I live in Seoul and I use it all the time. Would give it a 5 if it let me group projects, by client and then projects. This kind of hierarchical grouping would make it even more useful, as well as buttons to add 30/60 minute blocks for those times when you forgot to check in. Overall it does what it says it does quite well.

IJJ, Korean about Hours Keeper: Time Tracker, v3.4.2