[Spinosaurus]

Either:

a.) Manually modify your web page either through the existing files hosted by your provider, or by pushing something via ftp/git.

b.) Use a content management system (CMS), either custom or third party, to update content using whatever methods are in place (usually some sort of dashboard).

Additionally, note that many popular site builders (e.g. Squarespace) offer a mobile app for editing on the go.

[pks016]

Thanks for the recommendations. I am more looking for an app sort of, that allows to post directly.

I will look into CMS.

In regards to Squarespace like site builders, I have already domain and my website (just basic html and css). So, I am just looking for a service/system that allows me to host and it's app let me post directly.