Why isn't Google Field Trip available here?

I live in India. As quite a few of you would know, google released its Field Trip app for iOS yesterday. But:

1. I can't find it anywhere in the App Store.

2. I tried following a link via Google that redirected me to the App Store. It brought me to a list of apps by Google Inc. instead.

3. It doesn't say anywhere that Field Trip isn't US-only or anything.

So, what's next?