If you are looking for a crypto exchange that works best on PC as well as mobile devices,then Coinbase could be the best alternative for you. However, to begin its usage, you can do is create a new Coinbase login profile, if you do not have it already.
https://sites.google.com/bitlogins.com/coinbaselogin/home
https://sites.google.com/bitlogins.com/coinbaselogin/coinbase-staking
https://sites.google.com/bitlogins.com/coinbaselogin/coinbase-errors-issues