If your website defines a function called gonative_device_info, it will get called after every page load as shown below. You may then POST it to your server via AJAX, or do anything else with it.
function gonative_device_info(info) {console.log(info);}​// info will look like{platform: 'ios',appId: 'io.gonative.example',appVersion: '1.0.0',appBuild: '1.0.0' // will be appVersionCode (number) on Androiddistribution: 'release',hardware: 'armv8',installationId: 'xxxx-xxxx-xxxx-xxxx',language: 'en',model: 'iPhone',os: 'iOS',osVersion: '10.3',timeZone: 'America/New_York',isFirstLaunch: false // first time the app is launched}