Will the applications I install through
ubuntu-make update themselves automatically? Like when I install something with
apt-get or like when I add a repository.
Automatic update is not supported by
umake. You need to reinstall software when a new version becomes available (unless the software package itself has built in update functionality).
Umake simply downloads the latest version available from the official websites and doesn't give you much option in terms of versioning (besides sometimes having a stable and a beta version).