Morse program on Nokia 2.4.

I assume your computer is running Windows, and that it isn't a Mac or Linux or something. You probably downloaded an EXE program. For Android you need APK apps. I'm sure there's plenty of morse code apps in the Google Play store, for ham radio use etc.

 

Programs (or applications or "apps") are written for a particular operating system and won't run on a different one. Your PC operating system is Windows, your phone is Android. Programs/apps written for one are not compatible with the other. Therefore you can't just take a program made for your Windows PC and use it on your Android phone.
Not to worry though, just go to the Google Play store and search for apps with the terms "Morse Code". You'll find plenty of Android-compatible Morse apps.

 

The Morse program is only made to run on a computer, not a phone.
Go to the play store on your phone and do a search for Morse and install

 

FYI programs are always made to run on a specific operating system, like a program that was made for Windows will NOT run on Android, and vice-versa. EXE or APK refers to the program's file suffix, e.g. morse-program.EXE, which would run on Windows. Files suffixed with APK will only install and run on Android. Same for file suffixes like DMG, which is for programs intended for MacOS.