Growing up with pastoral parents who were both musical and devoted to the church, she moved from Iowa to Redding, California to be part of Bethel School of Supernatural Ministry. Her voice was introduced as a part of the Bethel Music collective singing her first recorded song, “You Know Me”, published in 2012 on their album, The Loft Sessions. In 2014, she released her first solo project through Bethel Music called The Undoing, a Billboard Magazine breakthrough release. In March 2018, Gretzinger released her second record entitled Blackout. In February 2019 she relocated to Nashville and became a part of Grace Center Church. She partnered with Provident Music Group in 2020 to release her third record, Forever Amen. Gretzinger released Faith of My Father in October of 2021 as a tribute to her father, who passed into Glory in 2020. The album was recorded at Wooster Church of the Nazarene in Wooster, Ohio, where her father served as a pastor for almost twenty years.