Ionic 1 doesn't apply changes

I am working on a project developed in Ionic 1 and I find that when I modify the code, none of the changes made are applied.

Any idea why it does not show any modification?

are you sure you are building the app via

$ionic cordova build android

Yes, I am compiling in IOS with the command “$ ionic cordova build ios”. I have also tried to run it from the browser and it does not work.