Hi @shelouveloso, it is a pity that you could not download the app you can probably ask @wherein leave a comment under their post here is the link.

https://steemit.com/wherein/@wherein/wherein-a-new-month-begin#@wherein/qbaup6
Otherwise you can post via Steemit or "world of xpilar" but use #wherein-art as first tag, the organizers know about some minor problem that is happening. Would be great if you could participate. Please check out the rules: make sure you dated and put your username on your work :)