What's New in Mobile 4.0? Follow Curious about how our new Mobile 4.0 app is different from the old iPad-only app? We've put together a chart for you to compare the two. Click here to read more about the Mobile 4.0 app! Related articles About Mobile 4.0 Custom Linesheets What version of Mobile 4.0 am I on? First time Mobile 4.0 users I have auto-update turned on but my Mobile 4.0 app is still not updating. Comments 0 comments Please sign in to leave a comment.