ionic

HTML

<script src="http://code.ionicframework.com/1.0.0-beta.6/js/ionic.bundle.js"></script>
<link rel="stylesheet" href="http://code.ionicframework.com/1.0.0-beta.6/css/ionic.css">
<div>
  <div ng-app="sampleApp" ng-controller="MainCtrl">
    <ion-checkbox ng-model="firstCheckbox">First Checkbox</ion-checkbox>
    <ion-checkbox ng-model="secondCheckbox" ng-change="uncheckFirstCheckbox(secondCheckbox)">Second Checkbox</ion-checkbox>
  </div>
</div>

JavaScript

var SampleApp;
(function(SampleApp) {

  var app = angular.module('sampleApp', ['ionic']);
  app.controller('MainCtrl', function($scope) {
    $scope.uncheckFirstCheckbox = function(secondCheckbox) {
      if (!secondCheckbox) {
        $scope.firstCheckbox = false;
      };
    };
  });

})(SampleApp || (SampleApp = {}));