SperrApp is a secure messaging app, which allows you to send, receive, and store messages on your mobile phone. It uses a combination of public key cryptography and symmetric encryption to secure your messages, files, and calls.

SperrApp is designed to protect the confidentiality of your messages, files, and calls. It can be used for both, personal and business purposes. With SperrApp, you can send secure messages to other users, and they will be encrypted before storage. It is also possible to make calls to other users and to use the app for file transfers.

SperrApp supports the latest Android operating systems, which makes it compatible with a wide range of mobile phones. The app supports mobile phones with an Internet connection and it can also be used on tablets and computers with a compatible browser.