Other apps have tabs but none have the ability to change the tabs yourself. There have been so many times when I find a tab online but disagree with one or two chords. Now I can change the tab so its perfect. Importing tabs from websites is super easy and editing them can be as painless or involved as you want. Im a perfectionist so I love that I can go into it and define the chorus of the song and the exact place where the chords match the lyrics. The other thing I love about it is that I can finally play along live with a tab. There have been so many times when I play and sing along with a tab and then the tab stops after the first chorus and says "repeat chord pattern for the rest of the song". Now I can make sure that I have the COMPLETE song and lyrics for when Im playing live. One of my favorite features is being able to tap the table where your iPad is sitting to scroll the song. I would love to see the ability to customize how many lines the app scrolls and the speed at which it scrolls, however. Sometimes it catches me off guard when it skips so quickly and can be a bit disorienting. Nevertheless, this app is the best alternative Ive found to having to stop playing to scroll. I do believe future updates may make this app perfect. For now I give it four stars because it is a great concept and if it were to implement some of the things I outlined above as well as suggestions from others I would give it five stars. This app is definitely worth the price. Especially considering that other apps charge a monthly fee for tabs.
Javie2004 about Perfect Guitar Song Book