The Frontier wallet is DeFi focused Ethereum wallet that is available to everyone on Google Play. Recently it came under TestingCatalog radar because of their latest announcement.
Now you can stake SOS tokens inside the app and this is probably one of the first apps that got this possibility. It is mostly relevant to people who were buying NFTs on Opensea during 2021 as they got these tokens airdropped for free.
SOS token belongs to OpenDAO which has a wide range of cool initiatives. For example, you will be able to get whitelist spots depending on your SOS power in the future. This project is called 721Starter and it is already available for testing.