Apollo is still relatively new, but we've been testing it in production in our own apps and with contributors from the very beginning. Right now the main apps that I know of are:
- Meteor Galaxy - unfortunately the app itself is behind a paywall, but you can watch this talk on YouTube about how we did it: https://www.youtube.com/watch?v=xwz1aXkJLLA
- NewSpring Church giving app, see a video about it here: https://www.youtube.com/watch?v=RGfn8GfC_uE
- The preview of Apollo Optics, a production GraphQL insights service we're working on, is also built with Apollo from the start.
We need to do a good job of collecting a concrete set of apps built on it - I'm sure I've missed several out there. Hopefully soon we'll get a good list of production apps up on our website, I think that will help people decide if they should use it or not.