You can add your own lyrics to Setlist Helper. There are several ways to do it:
Open the main menu of the app and tap Songs.
Tap the plus button at the top of the page. This will open the "Edit Song" page shown below. Fill in all the data you require on this page, then tap "Edit Lyrics..." as shown below.
Fill in the information you need and tap "Save". That will take you back to the Song Catalog. Tap the newly added song and you will see the screen below.
To add custom lyrics, tap "Edit" or tap the menu with the three dots in the upper right and choose "Edit". You will see the screen below when you edit.
The screen above takes plain text. Setlist Helper supports the ChordPro format. Below are some resources on ChordPro format:
If you create ChordPro files with either of these utilities, you can import them following the instructions here.
The screen above has two buttons on the top toolbar:
Not all ChordPro tags are supported. More will be supported in the future, but refer to the ChordPro help page for details on what is supported.
An easier way to add lyrics may be on your PC or Mac: