RAM cleaning app are the best tools to speed up your android phone and most of the OEM have their own and it looks like HTC is also getting ready to join them. HTC is running a preview program in which they are giving user a chance to use Boost+.
Boost+ is a RAM cleaning app which recommends closing just about every background app on your phone if you go into the boost section, including the Google app. The cache cleaner is aggressive too, Boost+ includes automatic RAM cleaning features in the settings. The UI looks good, they also have app locking feature and above the unlocking pattern they have space for advertisment which is not cool.
here are the screenshot
have you joined the program??