Android App CurrencyRates by Penny.
Connects via API using JSON to api.fixer.io. Saves locally into database and update new values for 4 currencies. Works offline and online, but requires at least to be online once to add data into database.
Last Updated: 2016, 7 November; Fixing the Historic values for currency view and adding other's current year currencies by month. UI for historic values for currency improved.
Penelope Quintero.