For Android, use a different demo server. In Metatrader Android, it is already connected with various brokers, just download directly from the Playstore, do not download from the broker's site. Meanwhile, for your PC/laptop, download from the site. Hope this helps. Thanks.
You can try it first. Please try it first.
Thanks.
To download Metatrader Android, you can access Playstore. How to log in and use it can be seen in the article Getting to Know MT4 For Android.
Forex robots can only be used on metatrader for computers/laptops, not on android.