DragonEx is a crypto / digital asset exchange that originates from Singapore, it also supports blockchain based technology games.
Apart from that, it has its own token, which is named Dragon Token with a total supply of 37,339,500 tokens, with the normal average exchange fees of other global exchanges, or around 0.2%, also supports Android and iOS applications, for Windows I have never tried it, unfortunately in my opinion the web is too heavy.
The Dragonex trading market itself is USDT / BTC