I tried to find that Chivo Bitcoin wallet that looks like a mobile app but I couldn't find it Google store, maybe because it is available only for citizens of El Salvador or because they will officially release new Bitcoin law and app in September of this year.
One more thing I noticed is that you must register with your phone number and facial recognition or verification through the call center for creating new account, and I think this is all based on strike.me application.
I am not sure if this app is going to be open source, but it is good that people have freedom to use any wallet they want, and open source is always a better choice.