This app was mentioned in 1 comment, with an average of 1.00 upvote
DroidEFB and Avare have been my go-to android navigation apps as of late.
If you're keen on a weekend hack, you can build your own ADS-B receiver too: https://www.reddit.com/r/flying/comments/3fscia/the_11390_adsb_receiver_for_foreflight_or_pretty/