No, but: https://democracy.earth uses a couple of systems to connect to it (https://fortmatic.com,https://www.portis.io, https://walletconnect.org) - I don't know why they ditched https://metamask.io.

Overall the adoption of these systems is too difficult. Something that could be overcome with signal/mobilecoin.

Democracy earth is just an example application. Overall I would appreciate to own my data and have it secure (like signal provides), when it comes to the whole ecosystem of the future for: social media, voting, contracts, etc.