Boost mode can be used only with Xposed installed, as Greenify will install a Module for Xposed to enable some of the experimental features. However, a few features are limited to Donation Package, which i think, is worth every penny .
Also, there are a few extra things you can do with Greenify, but need manual activation:
- Automator - Activated under Settings > General > Security > Device Administrators - this one handles the automated stuff
- Accessibility - Activated under Settings > Device > Accessibility > Services - strangely, this one wont work with Samsung TTS, so you need to switch to Google TTS
- Notifications - used to be activated at Settings > General > Security > Notification Access, but seems deprecated
For anyone in to beta testing: