Considering the communicational maturity of the most important union in the country and the characteristics of its internal public, AEBU decided to have its own app for mobile phones and tablet devices. We worked on a tailor-made design which reflected the institutional line of the organisation and combined every development aspect to ensure proper functioning. This tool will allow users to access all the contents in the web portal (news, Infoaebu, documents, official publications, information on services and agreements, multimedia contents), as well as exclusive instruments (Google Map location of all the regional offices, the union’s YouTube channel). The first version is for Android and it will be supplemented by a similar one for iPhone.