Ok, I should have written this a few months ago, but well, better late than never.
After a couple months of development, CambiosUY is now available in Google Play. Unfortunately Google does not support merchant registration in Uruguay, which means I cannot provide in app purchases in CambiosUY. For this reason, the notifications feature (available for iOS) will not be available until this situation is fixed :=)
I hope you enjoy using the app, and as always, all feedback is welcome!