I created a Dice app (one more Dice app heh) for learning purposes and a (brazilian) Social Security app for people to check their day of payment based on their card number.
Social Security (Calendário INSS 2019): https://play.google.com/store/apps/details?id=com.marcelovictordecarvalho.Calendario_INSS_2019
Mini Dice: https://play.google.com/store/apps/details?id=com.tapjitsu.Mini_Dice
If you could install and verify if it works ok on your devices, i thank you all in advance!