Teena - Guide to Periods is a free iPhone app developed by Valley Electronics AG, tailored for teens navigating the world of puberty. With a focus on cycle tracking and women's health, Teena aims to prepare teens for their periods in an engaging and informative way. The app goes beyond a typical period tracker, offering a wealth of knowledge and support for teens during this important stage of life.

Teena provides a plethora of features to empower teens. From educational articles in Teena Magazine to an animated Cycle Journey, users can explore topics like their cycle, hormones, and overall health. Additionally, the app allows users to track emotions, understand cycle signals, and gain insights into their cycle patterns for a better understanding of their bodies.