Detour is offering their GPS-Guided Audio Walking Tours for FREE (regularly $4.99/guide) for a limited time. Detour is available for Android in the Google Play Store and iOS in the iOS app store.

Detour offers immersive audio walks that guide you through the world’s most interesting places with the people that know them best. Whether exploring solo or with friends, Detour will change the way you experience places. Available in 17 cities around the world with 180 tours to choose from.