TextReverse + CaesarChiffre

This App edits your text you write. Send the edited text to your friends. The App is able to do:
example > elpmaxe(reverse)
example > 3x4mpl3 (digits instead of letters)
example > e x a m p l e (space between letters)
example > ExAmPlE (big and small letters)
example > eexxaammppllee (double letter)
example > xmpl (without vowels)
beispiel > ǝxɐɯdlǝ (upside down)
abc > a
b
c (one letter per line)
Encode your text with the caesar chiffre and send it to your friends and family. To decode the next, you will have to know the key. Will your code be hacked?