M_APP focuses on the challenges informal learning causes when it comes to its documentation and reporting because, practically, it can occur anywhere and at anytime in our lifetime – and we are rarely equipped with documentation instruments at these moments in time. Nevertheless, informal learning in adult life is considered as one of the most crucial factors in LLL, therefore making it more transparent as well as easier to be recognised is heavily demanded by policy makers, education experts and, last but not least, the learners themselves.The starting point of our project is the fact that nowadays more than 40% of Europeans are equipped with mobile devices (smartphone or tablet PC), and the number is rapidly increasing. Since most people have their mobile devices with them constantly we had the idea of providing these devices with an app which allows people to document, structure and report informal learning activities whenever they happen.For testing the app on defined learning processes, we focus on the acquisition of the LLL key competences “learning to learn” and “social and civic competences” as results of informal learning processes during transnational mobility visits. We will describe the two selected competences according to defined indicators and we will develop a procedure which allows their recognition following app-based documentation and proofs. In this context, we will not only be able to provide adult learners with an innovative informal learning documentation tool but also to promote the concept of the LLL key competences as well as to raise awareness about potential informal transnational learning mobility visit offers.All products will be tested by several evaluation loops before being published in EN, DE, RO, ES, SE and TR. Our multi-layer partnership was carefully selected ensuring maximum competence and experience in terms of the project’s tasks and objectives. Of course, the project will be professionally disseminated and promoted.