Ril 301 DB Signale is a free Android app developed by 2denker GmbH for the employees of DB Konzern. The app is designed to help DB employees learn and look up railway signals used by the company. It is important to note that this app can only be unlocked with a voucher code, which can be obtained through your employer. The app's content and functionality are identical to the "DB Signale" app, which is recommended for non-DB employees.

The Ril 301 DB Signale app allows users to familiarize themselves with the railway signals used by DB and to access the contents of the signal book. The app provides an interactive learning experience that includes quizzes and flashcards to reinforce knowledge. It is a useful tool for DB employees who need to learn and remember the various signals used in their work. However, it is important to remember that this app is only available to DB employees with a voucher code.