Yes, although I suppose most people in crypto are already enjoying a healthy level or paranoia there is no such thing as too careful. The application listed in the official Google Playstore is going to take a lot of paranoia away.
Thumbs up!
Nah, listed on Google Playstore is not 100% the apps is original and safe, you need to take further investigation. If you search about fake wallet listed on google playstore, you can easily found it [1] [2]
Since this wallet has been announced on official twitter, github, and website from Sumokoin... I think this is an original android wallet from Sumokoin.
[1]
https://nulltx.com/google-finally-removes-2-fake-cryptocurrency-wallets-from-the-play-store/[2]
https://bitcointalk.org/index.php?topic=5161847.0Disclaimer : I'm not promoting this wallet