Raphael Hack 30.5.1

Features:
- Video lectures: learn and review all relevant concepts faster and easier
- Learning material: download presentation slides for later use
- Learning progress indicator: check your progress for each course
- Synchronization between all devices: simply continue learning seamlessly on another device
- Offline availability: learn on the go
- Notes: create notes about your presentations
- Playback speed: adjust the speed of the videos to your learning speed