Its an incredibly well engineered app. I ran it on my phone and it wouldn't even lag and looked incredibly smooth. I have other apps on the phone which wouldn't

Its an incredibly well engineered app. I ran it on my phone and it wouldn't even lag and looked incredibly smooth. I have other apps on the phone which wouldn't come anywhere close. As soon as you used it whether it was pleasant or not it felt like a lot of effort was spent putting together the simple thing that it was. I emailed the devs once to ask them a bit on how they managed to get it this way but they seemed too busy then. They said they would make a blog. I hope they still do this.