This app was mentioned in 13 comments, with an average of 2.00 upvotes
You could try djay 2 on Android, to play and mix music from your phone, but I wouldn't recommend doing this to DJ a wedding. It's possible, but would be difficult - it's more of a fun app.
Tried both of those and prefer this.
None of them are really a replacement for two 1210's and Serato though, but they are much, much cheaper.
So there's that...
Edit* spelling
this works with streamed Spotify, and local content...
https://play.google.com/store/apps/details?id=com.algoriddim.djay&hl=en
djay 2 is on sale as well for ₹10 ($0.15) in India.
Can anyone check if Djay 2 by Algoriddim is supported? https://play.google.com/store/apps/details?id=com.algoriddim.djay
djay 2 is one I like: https://play.google.com/store/apps/details?id=com.algoriddim.djay&hl=en