This app was mentioned in 3 comments, with an average of 1.33 upvotes
Android https://play.google.com/store/apps/details?id=io.cordova.MassTimesAndroid
https://masstimes.org/ online
app android / google
Apple
https://masstimes.org/
https://itunes.apple.com/us/app/mass-times-for-travel/id825001975?mt=8
https://play.google.com/store/apps/details?id=io.cordova.MassTimesAndroid&hl=en_US