This is a different breed of updater! This one checks for updates when you want to check for updates! It then will email you everything you need to know and a quick link! There is, however one caveat, it requires iOS 14's ability to run automatons automatically. But, there is a jailbreak tweak called TruestCuts that gives you the same exact functionality! This shortcut has been tested and should work perfectly on iOS 13 & 14. Currently, it supports the default Mail app, but you can add a notification or another mail app if it supports notifications!