Use APKPure App
Get Message Encryptor X - Secret M old version APK for Android
Crittografa il testo e usa qualsiasi messenger per inviare un messaggio segreto a un amico.
This App encrypts text with several encryption methods using password you entered.
It does everything locally on your device and does NOT store any data.
It is like calculator without memory.
After text is encrypted you can send it as a message using any type of messenger, e-mail or sms.
The recipient of your message should know the password and use this App to decrypt your message back to readable text.