How to download Grok 1?

Hello there, I'm curious about downloading the Grok 1 application. Could you please guide me through the process step-by-step? I'm not very tech-savvy, so detailed instructions would be greatly appreciated. Specifically, I'm wondering if there's a specific website I should visit, any prerequisites I need to meet, and whether the download is available for both iOS and Android devices. Additionally, are there any security measures I should take into account before downloading the app? Thanks in advance for your help!