Continuous development to reload app without re-install

[humanely]

Maybe this is there already, so please guide me. I searched various keywords to find developer mode or development framework of this app.
So basically, this app needs to be installed to run(i am on MAC). But for every change, I need to re-install to test the changes. Is there a way to develop in live-reload mechanism? If someone guides, I can develop that.

[malv-c]

you should use a vm to test change and automate test with the original