Grab the latest copy of YAML from the Releases page and use your favorite deployment tool (such as kapp or kubectl) to install it.
Example:
$ kapp deploy -a kc -f https://github.com/vmware-tanzu/carvel-kapp-controller/releases/latest/download/release.yml
or
$ kubectl apply -f https://github.com/vmware-tanzu/carvel-kapp-controller/releases/latest/download/release.yml
release.yml
is produced with ytt and kbld at the time of the release. You can use these tools yourself and customize the kapp controller configuration if the defaults do not not fit your needs.
Example:
$ git clone ...
$ kapp deploy -a kc -f <(ytt -f config/ | kbld -f-)
Next: Walkthrough