I believe EDOM (our Distributor in Taiwan) has 1 and 2 (but as an evaluation board).
We provide an Android app on Google Play, this is documented on the forum (no source is provided): WICED SMART Explorer is now available on Google Play....
For 3 and iOS sample apps, I will need to ask others for their input.
I have not heard on this except one reply. Awaiting reply.
We recently released a document which contains all of the evaluation/reference boards available and planned for upcoming release: CYW2073X Product Portfolio (Module and Evaluation Board Overview)
For boards/designs not listed in this document and supported here on the community website, please contact your local Broadcoms sales/Manufacture's Rep.