Klapp is a revolutionary software solution for communication between schools, parents and students. Communication, which today takes place via many different channels (letters, circular telephones, e-mail, whatsapp/SMS), is brought together in a central channel controlled by the school. Klapp addresses a central problem for schools, but is also 1:1 applicable to other childcare institutions. Klapp is live: over 200'000 parents are currently using the app. Feedback from parents and schools is very positive.