Could be a good app, however…
Response from developer
Thank you for your feedback, I’m delighted that you find the app well designed. Building and maintaining an app requires a lot of effort and work. It is entirely free to browse all the sites, you are not required to pay anything unless you want to keep track of your favourites and visited sites. It is sad to read that you to not value other people’s work and are entitled enough to write about it. Please request a refund on the App Store if you mistakenly paid $9, so you can put it towards your next business class flights to go explore world heritage sites.