Telekom's Freizeichentöne app is a lifestyle application available for Android users. The app's primary function is to provide personalized ringtones for the caller instead of the standard "Tuut, tuut" tone. The app offers an extensive music selection, ranging from top charts to evergreens, and users can also record and assign personalized messages to specific individuals or groups. Users can also add various voice filters to their recorded messages.

One of the best features of the app is that there are no costs for the caller when using the personalized ringtones or messages. The billing for the service is done through the user's mobile bill, and no Google Checkout account is required. The app is available only for Telekom customers in the German network and has complete WiFi compatibility. The app is available for Android version 5.0 and above.

It is essential to note that users are responsible for the content of the messages they record and assign to callers. The app provides a wide range of pre-installed messages that users can use for free.

Overall, Telekom's Freizeichentöne app is an excellent application for Telekom customers who want to personalize their calls with ringtones and messages. The app is user-friendly, and the music selection is quite impressive, making it an enjoyable experience for users.