If for some reason you are currently not able to login into AvaTradeGO, please check if you are able to login into your My Account are via the browser (on your mobile or PC). We would suggest cleaning the cookies and cache on your phone.
Additionally, we would like to add that you are also able to use the MetaTrader mobile apps, which are simply called MT4 and MT5 apps.
For instructions on how to clear cookies and cache, please read the article: How do I clear cache on my mobile device?
If you are experiencing difficulties performing these actions, you may also contact Customer support for assistance.