This app for iPhone and iPod touch includes an extensive guidebook and comes additionally with 3 months of free Lunar Calendar Data, starting on the initial day of usage. Additional Lunar Calendar packages are available through In-App Purchases. The Lunar Calendar according to acclaimed writers Johanna Paungger-Poppe and Thomas Poppe ("Guided by the Moon", "The Art of Timing", "Moon Time") provides ancient knowledge and a practical day-to-day guide for all zodiac signs. The calendar function is a handy tool for planning ahead and finding the perfect timing for activities in the area of health, nutrition and diet, hygiene, construction, household and gardening. The Lunar Guide is of even greater practical use than a horoscope. There is also the option to create graphic displays of different people's biorhythms and carry out partner rhythm comparisons.