Concert is an open-source application, you can download and install it.
I created this application for my music group. At each concert that we have planned, we enter the date. We enter all the song texts we want to play, and just by clicking on a word, we can put the chord there ... All the musicians and singers work on the same documents. Emphasis was placed on saving paper for printing scores.
If you want I can install a version for your band in my cloud.
Contact me at: email@example.com