Hey Pavel,
Even though our team is expanding, we're still a boutique software house and there's shifting priorities. A small subset of our team created the beta version of the mobile app in part to see if there was a demand for it and how it held up in real life. The feedback is positive but there are discussions over its broad appeal for communities that fall outside of a forum focus.
We recently blogged about how we've brought more PWA features to ensure your site runs as close to native as possible as a web app so that if your community has a lot of customisations, or is heavily focused around gallery then your members have a smooth mobile experience.
We have no updates at this point on the mobile app, but I'd expect after 4.6 has been released we'll have more news to share.
Thanks for your patience.