9apps.com is just like a playstore it provides you many apps which are also available on playstore and you should not use 9apps.com if you dont want virus to get into your mobile phone.
UI of Site/App:
9apps is having a worst UI the colour of the UI is very irritating. Nothing is arranged in the correct order it is very difficult to find our desired app/game.
Security:
9apps is very bad in terms of security if you will download apps from 9apps there is 98% chance that a virus will make its way to your phone so don’t use 9apps.
Reccomandation:
I would not reccomend 9apps to anyone because it is a house of virus and you should use playstore to download your desired apps and games.