Our partners from izi.travel have created a neat app for use in museums and for city tours, available for Android and iPhone. With more than 100 tours they have one of the largest selection of tours, and they also offer the guides produced by iAudioguide. The ap works offline, and both museum tours and city tours are possible. As a special feature, a location based function lets the audio tracks play as soon as you approach the attraction. Download the app directly from the izi.travel website. The OPAS izi.travel app is one of the very few available for Windows phones.