You can hide apps on HTC One, so they are no longer visible in app list.
- Go to App List (App drawer)
- Tap three dot button at the top right
- Choose "hide Apps"
Now you just need to mark the apps to be hidden
- Tap "Done" when you are done.
Number of hidden apps is shown right to the "Done" button
To show hidden apps, you just need to follow the same steps and unmark them
I hope this short tutorial is helpful?