Gmail's merciful 'undo send' feature comes to Android
 

Gmail's desktop 'undo send' feature is a godsend for the mashy-handed, letting you recall an email for a short time after you've sent it out into the internet ether. Now -- finally -- it's available on Android with the latest Gmail update (version 8....

https://www.engadget.com/2018/08/21/...es-to-android/