Oasis is a centralized cryptocurrency exchange that was launched on July 2019. It was formally known as Baibit, Oasis is a South Korean exchange and knowing that Asian exchanges perform better, I decided to sign up for an account with Oasis.
It website is always accessible and it is also available as a mobile app. I do not really like the look of its interface because it looked very outdated. It supports fiat currency but only with its national currency, KRW. It has a good number of cryptocurrencies available for trade with many paired with KRW. However, I could not trade here because the look of the interface does not really okay to me so I left it. I will advise you to make your own research on it to know if you will like it but as for me, I can never trade on Oasis.