Many things just don't work well in the Web. Notably games or productivity tools that are expected to be fast and always available. The hey app in question also

Many things just don't work well in the Web. Notably games or productivity tools that are expected to be fast and always available. The hey app in question also has a (REALLY FAST, seriously its like a 99% lighthouse score!) website but the App is much faster than it and 'feels right'