if Android Device and not google chrome (conditional)

Question

Anyway to write a conditional; ONLY if Android Device and not Google Chrome then do something.

So, detect if Android (easy via below) but do something based on if Android and NOT google chrome; for instance do something for all Android users that are not using google chrome.

Any ideas if possible to add such a condition in similar format as below? (this works for detecting Android, I need to add condition for if Android and not Chrome > do something)

// var ua = navigator.userAgent.toLowerCase();
// var isAndroid = ua.indexOf("android") > -1; //&& ua.indexOf("mobile");
// if(isAndroid) {
//  alert("Android!");
// }

And I found you can detect chrome with something like the below (no way to combine them?)

var is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;