GrandOption is a binary options broker founded in 2014 that is regulated by CySEC and based in Cyprus. It offers high/low binary options on indices, stocks, forex, and commodities with expiry times ranging from 30 seconds to end of day. Accounts require a minimum deposit of $100 and allow returns of up to 89%. While mobile apps are not yet available, GrandOption provides education materials and a demo account to help traders.