This is a digital hymnal, an app for songbooks of LLC, SRK and SFC. You can purchase desired content as in-app purchases. English-language content is from Songs and Hymns of Zion, published by Laestadian Lutheran Church (LLC). You can also purchase notation and sound files for the songs in the app. You can order printed songbooks, the accompanying chorale book and recorded albums of songs on the LLC website llchurch.org
Finnish-language material is published by Suomen Rauhanyhdistysten Keskusyhdistys ry (SRK).
Swedish-language material is published by Sveriges Fridsföreningars Centralorganisation (SFC).
You can buy printed Finnish and Swedish material at julkaisumyymala.fi