Never.
Use the site as a PWA, it works fine on any reasonably modern Android device.
If someone wants to make an app, the data is all there, help yourself! But making an app would double (or more) our development load, and it simply isn’t worth it. Modern PWAs are, for our purposes, every bit as good as an app, and we will focus on making the site better. We can even get the site added to the app store, we just haven’t got around to it yet.