Can I connect my apple watch to an Android phone?

Hi! Unfortunately, this is not possible. As per the Apple Watch page on Apple's website, "Apple Watch Series 5 and Apple Watch Series 3 require an iPhone 6s or later with iOS 13 or later." This is the same for Series 4.

Hope this helps. If you have further questions, let me know.

No to connect to an android you need a watch that supports android wear.