Could be a good app, however…
The premise of the app is cool, but nonetheless it is an act of undeniable cowardice that listing World Heritage sites that you’ve visited requires you to pay $9. The developers deserve their flowers for making such an accessible, well designed app, but their gluttonous greed ruins the experience. Visiting and learning about World Heritage sites should be an educational cultural experience, and hiding the opportunity to map these cultural connections behind a paywall is in awful taste. I highly suggest finding another app.