Because tapatalk sucks ass. It does that annoying popup every time you visit the forum through the browser on your phone (does it still do that?). Besides why even have an app? what do you need to do that you couldn't do with a web browser? not a whole lot really, if you want you can pin bitcointalk.org to your launcher so that it has it's own icon and it would essentially be the same thing as a dedicated app.

There is new forum software in development for bitcointalk which will be more mobile friendly than what we've got now. I don't think there are many good options for mobile friendly themes etc for this old version of SMF. I think we'll have to wait for the new forum software.

I dont think tapatalk is very secure. There are more pressing issues the site needs to deal with first

I want tapatalk or an android app as well. :/

You can browse using Chrome. I've been using it since day 1 when I started using a tablet and I did not encounter any problem so far. Only good thing with using tapatalk I think is you'll never see those signature's.

I think it's a great idea. It's way faster to use than in the browser on my phone, because you don't have to scroll and move around the page the whole time. And because this is a SMF forum, it wouldn't be hard to implement.