First of all: it's a great app that is very useful for events! Its functions work pretty good.

But ...
The app is generally very slow.
it's slow on startup. it takes many seconds (like 5-10 seconds) to start the app and start doing something with it. I don't understand why an app like this should be this slow on startup.
it's also very slow and laggy when navigating around, especially when I'm at an event and I'm navigating my pairings or standings and such.
It's actually annoyingly slow. And I have a very powerful smartphone (Google Pixel 2 XL). if the app would be snappy in tournament and event situations that would be so nice!