Riot/Android doesn't run on Linux, so directing limited resources into it is fairly irrelevant. The point of this campaign is to fund us to work on a native app which can benefit desktop and handset users alike - whilst also supporting the core team so we can also work on the React, Android and iOS SDKs which power Riot. I keep mentioning desktop because this is a significant benefit of the campaign.
The idea of somehow ripping out the core of the Signal or Ring apps and trying to bolt their UI onto Matrix SDKs is an interesting one, but in practice both protocols have significant differences to Matrix, and at best this would be a pretty big impedance mismatch. Of course, someone in the community is welcome to try to do it. Meanwhile, we'll keep plugging away at trying to make Riot kick ass (via the underlying Matrix SDKs), and add a native app to the pantheon too :)
The idea of somehow ripping out the core of the Signal or Ring apps and trying to bolt their UI onto Matrix SDKs is an interesting one, but in practice both protocols have significant differences to Matrix, and at best this would be a pretty big impedance mismatch. Of course, someone in the community is welcome to try to do it. Meanwhile, we'll keep plugging away at trying to make Riot kick ass (via the underlying Matrix SDKs), and add a native app to the pantheon too :)