Explore Utsira

I am looking to develop an app for a small island which will serve the purpose of being an explorer app that is able to show you a map of the island, and give you information, stories and facts about certain places around it. The island is quite small, but especially during the summer, there are thousands of visitors from different countries that comes to visit. Instead of having locals or guides with you to tell you facts and stories, this app can be a handheld guide that anyone can use. It does not have to be super advanced, but rather super easy to use. Would be nice if there is an IOS version and Android version.