Dr. Alexander Rieger

Rated 4.41(5,681) — Dr. Alexander Rieger

Wake up gently and relaxed every dayTurn your device into a sunrise simulator and wake up naturally by light. Light leads to biological processes in the body leaving the deep sleep cycle and preparing for wake up.***** Basic wake up light functions can...

Rated 4.40(10) — Dr. Alexander Rieger

1,2,3,PI! Can you beat your friends in mental arithmetic? Clash with all in a multiple choice math competition and rank first place in calculation such as addition, subtraction, percentage, ratio, multiplication or division.Clash and CompetitionClash...

Rated 4.54(98) — Dr. Alexander Rieger

Wake up gently and refreshed every dayTurn your device into a sunrise simulator and wake up naturally by light. Light leads to biological processes in the body leaving the deep sleep phase and preparing for wake up. You will have complete control over...

Rated 4.71(42) — Dr. Alexander Rieger

Can you beat your friends in quiz questions? Clash with all in a multiple choice competition and rank first place in questions about TV & film, music, sports and other categories.Clash and CompetitionClash with a single person or in a competition group...