In Turkey people check the dollar and gold price many times a day. DolarKaç shows Grand Bazaar free-market prices updated every second, with no sign-up and no pop-up ads: dollar, euro and 20+ currencies, gram and quarter gold, Bitcoin, fuel prices in 81 provinces and 40+ calculators. For developers: a free JSON API, an npm client, a WordPress plugin, a Chrome extension and an open CC BY dataset of daily prices since 2010.