Drillster is an adaptive learning app that anchors and retains knowledge and skills. Truly unique is Drillster's capacity to calculate how and when knowledge declines. Drillster sends the learner a notification just before important knowledge tends to decline. Knowledge remains top-of-mind year-round. Drillster has proven to shorten the learning time by at least 40% while increasing the ROI on learning by more than 10%. Drillster is used by large corporates like KLM Royal Dutch Airlines, Rabobank, LCL, TUI, and Transavia.