GeoCash is a data collector app that allows any user around the world to share their private and anonymous data with GeoDB’s Data Sharing Ecosystem while being rewarded with GEO tokens on a daily basis. 

Recommended Code 
COPRO_YAKTEM
Use to get a free GEO! 

https://play.google.com/store/apps/details?id=com.geodb.geocash
(Download here: downloads.geodb.com) 

Free virtual currency, You are an early adapter.
https://blockchainpromotion.blogspot.com/