Audio guides, video guides and other apps are not very common in science museums. App experiences on mobile devices can provide an opportunity for visitors to engage with exhibitions pre-, in-, and post-visit, enhancing their overall museum experience. We will show how apps can create interactive, free-choice learning experiences presenting 5 case studies. Can apps give the visitor owner- and user-ship? We will explore the philosophy behind the idea of a mobile digital guide and share how the presented tools were evaluated. The session is a workshop and participants will try the MUSE video guide in situ. Case studies: Digital Learning Resource (Science Museum – London); the Wandering Project (Israel); Explora MUSE (Trento); the Eureka quest (Philips Museum – Eindhoven); the Rijksmuseum app (Amsterdam).