Hi all. First, sorry for the update version confusion. The app is reporting the version of WTIU code itself and not the full update image. This is something we are planning to change. The WIU, DCS Explorer, etc., both report back the (download) version and the WTIU should do the same. In the meantime, if you update v1.2.0 and then readback the version number using the app, v1.06 is correct. You can see the actual downloaded firmware version (v1.2.0) in LuCI. When you first login, it is shown on the home page.
The initial update prompted by the app was hard-coded as we expected the WTIU would require an update out of the box. The timeframe between production and reaching your layout was about 3 months and we were still working on things. Even now, we continue completing new features. One of the new features is an elegant update process. That is, the app will go out to our website on occasion and notify you if there is an update available. Then, just tapping "install" will get it done. We just didn't have time to implement this prior to release. You will not need to use LuCI thereafter although, she will still be available.
The 60Hz buzz in the variable channels is not a firmware issue. This is caused by the severely chopped AC waveform put out by the ZWL. We are looking into how we may be able to improve or eliminate this mechanical noise prior to the next run of the WTIU which is coming soon. Also, we will see if there is something that can be done in the field for those that it really bothers. The buzzing is no doubt a nuisance but, harmless and varies from nearly inaudible to annoying depending upon your particular WTIU.
The apps are both in the process of being refactored. Over time, they have become a little stale when compared to updates to both iOS and Android operating systems. This is not uncommon, it was just too much to take on prior to getting the WTIU out. So, now, we are going through that process and expect significant improvements in performance and stability once completed. In particular, the Android app has some known issues that can cause instability when combined with certain hardware (thousands of different devices) and Android versions (hundreds of different versions). That said, once we bring the Android app fully up to date as if it were written today, we should see significant improvements overall. Hang tough, we'll get you there.
We have no doubt after some time in the wild and enhancements by MTH along the way, the WTIU will be the most stable and reliable digital control system available for model railroading. This is complex stuff and some tweaks are to be expected so, again, please be patient with us as we are indeed on it.
Thanks!