References:

• apple swiftUI docs
• https://www.sqlite.org/cintro.html
• https://medium.com/@imbilalhassan/saving-data-in-sqlite-db-in-ios-using-swift-4-76b743d3ce0e
• https://stackoverflow.com/questions/56691630/swiftui-state-var-initialization-issue
• https://stackoverflow.com/questions/40562912/how-to-cancel-usernotifications
• https://stackoverflow.com/questions/57244713/get-index-in-foreach-in-swiftui