This app was mentioned in 3 comments, with an average of 1.67 upvotes
If you get pretty far and don't feel like killing a good run with a bad synergy, you can use this web-based cheat-sheet.
I'm a big fan of this Android app, though. It's a fantastic resource.
Shoutout to The BOI: Rebirth Resource for Android as well.
I use this one and it seems to be the best one I've used