Check this site to master your guitar skills.
A half of our users just want to play songs. Other 42% want to learn tabs. 8% play tabs in their bands - great job guys. And only 2.1% want to impress smb with their preformance.
Another great opening for us is that 73% hold guitars when browsing 911tabs. So, we thought: "hey, a lot of users hold guitar. They definitly need to tune it." So, we'll add tuner soon.