WorshipReady.com makes chord charts specifically for use with OnSong. WorshipReady.com is a subscription with varying levels depending on how many songs you need to download per month. You can sign up for WorshipReady.com.
To access WorshipReady.com, locate the Songs button in the upper left corner of the Menubar and tap to open the Songs Menu. Make sure that you have the Songs tab selected and that you are viewing All Songs or a book. Tap on the + button in the lower right corner to access the Add Songs Menu and then tap on the WorshipReady.com option under the Import section.
Of course, before OnSong can access your WorshipReady.com account, you will need to sign in. Enter your WorshipReady.com credentials. If you are having trouble signing in, reset your password. Once you've signed in, you should be able to search for songs to import.
Use the interface in OnSong to search for songs to import. Once you've found one or more songs you would like to import, tap on the song to place a checkmark to select it for import. You can then tap on the Import button in the upper right corner to import the song into your OnSong library.
You have a limited number of monthly downloads depending on your subscription tier. The number of available songs appears at the bottom of the screen. You can also use this area to sign out of your WorshipReady.com account if required.