function isAppInstalled (bundleId) {
    if (typeof bundleId !== 'string') {
        throw new ProtocolError('isAppInstalled command requires bundleId parameter from type string')
    }

    return this.unify(this.requestHandler.create({
        path: '/session/:sessionId/appium/device/app_installed',
        method: 'POST'
    }, { bundleId }))
}
Check if an app is installed.

<example>
    :isAppInstalled.js
    it('should check if app is installed', function () {
        var isAppInstalled = browser.isAppInstalled('com.example.android.apis');
        console.log(isAppInstalled); // outputs: true
    });
</example>

@param {String} bundleId  ID of bundled app

@see  https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/other/appium-bindings.md#is-installed
@type mobile
@for android