Last year some projects included a banner for WLM on mobile main page: https://commons.wikimedia.org/wiki/Commons:Wiki_Loves_Monuments_2012/Mobile_...
An user has reported that the link is broken. The new URL should be https://play.google.com/store/apps/details?id=org.wikilovesmonuments
I have found it active on ca.wiki, it.wiki and nl.wiki (exemple https://nl.m.wikipedia.org/). Not sure if it is live on more projectes. Please, review and update the broken link.
Vicenç