Unfortunately, at the moment there are and have been (since quite a long while) inconsistencies between the mobile (3 versions: BIMx, BIMx Pro and BIMx Lab), desktop and web versions of BIMx. It almost seems as if all 3 are being developed by entirely different teams. While I haven't had the chance to test out Android version of the app, I can tell you some of the lacking features on the desktop are:
1) No 2D Documents
2) Lack for controller support
3) Lack of opacity map support (This is only available in the BIMx Lab app)
4) No VR
The desktop app does however have these functions that otherwise lack on mobile:
1) Support for turning layers on and off
2) Global illumination lighting (even though this is massively buggy on desktop)
Overall, the desktop app feels much less intuitive, as it hasn't been updated since years. The entire BIMx experience is a wasted opportunity and feels like using a band-aid to mend a broken arm. Unfortunately this has been the case since many years. BIMx or VBE as it was known before, used to be a paid application for a while. Graphisoft has then made it freemium, with an expensive tag on 2 features that only run in the mobile app. I can't even imagine how frustrated I would be, if I was paying for a massively underdeveloped app.
**Edit**
Also, I have just revisited the Web version, and it further illustrates my point. Some of the differences on the web are: inverted mouse movement, No SSAO or any other shading option, very few settings in general (only two: markers and zone switches). Haven't had the chance to use the gallery function yet, so I can't say anything about this.