What I need is some open source code that converts the text which I get from the 10C API to markdown text, so I can display it properly inside the app I'm writing.

Give me that for Swift and I'm happy. ?

I think under those circumstances I should focus on 10C. I can easily change some code to work with the API, and still have the same UI I intended for the ADN version. Plus I might make some money in a network which is growing.

// @height8

No, I'm looking for a framework which lets me display markdown text properly. Sorry for the confusion. ?

Kinda. The only difference in the UI is that 10C supports full markdown, while ADN only has some entities. Makes it a bit harder to parse and display.

Alredy looking for a markdown library for iOS. Any help would be appreciated. ?

It wouldn't be a complete rewrite but some things are handled differently here compared to ADN.

@height8 Most of my doubts come from the fact that I emotionally invested in ADN. For me this isn't just another social network, although you might be right with saying that it's slowly dying, and there's no future for it. And of course it's a matter of the time I already invested in writing the app, although in its current state it's still not ready to be published.
The dev in me says I should abandon the sinking ship and find a place where I can build something new, and maybe earn a few bucks. The user in me tells me that ADN is still a great place where most of the people I follow still use the service.
I guess by thinking about it I will eventually kill the ADN version and focus on 10C, I'm apparently not yet ready for it.

Yeah, the decline of ADN is one of the reasons I started thinking about it.

I've been thinking the whole day about whether I should stop developing Fire for App.Net. For me it's a tough decision, but maybe it's better to build a tool for 10C, which hopefully has a brighter future than ADN. Can't decide just yet.