Mobile wallets are not ideal and I would never keep any significant amount of coins with them, especially if they are in early development phase.
Stack wallet released new version called Stack Duo that is only used for Bitcoin and Monero.
I think this is perfect solution to avoid complications with other shitcoins, and people can still use full version with other coins if they want.
Please note that Stack Duo is currently pre-release version, and I don't suggest anyone to use it a s their main wallet, this is still testing ground.
https://github.com/cypherstack/stack_duo/releases/tag/build_004
PS
This is not-mastercard logo