Compose, save and share knowledges, optimized for mobile use is with todays internet tools very difficult. To solve this, the Swedish entrepreneur Patrik Troell founded the startup Link Learning. The idea is, that everyone, in an easy way, should be able to share their knowledge online and offline with other mobile device users. A user can also sell copy protected knowledge packets through the Internet hub. A small percentage fee of the price is payed to link learning for this service. The tools and web spaces are free of use on not commercial use. A public beta version will be available 2021.