yes I tried that program, and found some (rather annoying) problems.
it retrieves one page at a time, blocking you from doing nothing but looking at that progress dialog progress. whenever you want to see the next page, you have to click on "menu -> next page" and wait for another progress dialog to progress.
the image viewing is fixed to a certain size (the screen size) which you can't zoom or scroll.
the hosts are hard-coded into the program and i find no place to change it.
I grabbed the source code of danbo and tried to improve it, but it's user experience flow just don't fit my taste.
that's why i started this project. it's designed with user experience and usability in mind, tries hard NOT to block you from doing something else. the progress dialog in single page view needs a rework and i'm trying to get rid of it.
auto-page fetching, so there's no waiting for the progress dialog to download the next page.
async preview image downloading, fetch preview images one at a time ONLY.
normal image viewing capability - zoom, scroll, etc.
you can also search through tags with the built-in search function. multi-tag search is a bit tricky, but works anyway. spaces are replaced with underscore (because it's hard to type with a soft-keyboard), and you seperate tags with "+".
it lets you share your favorite pictures through android's built-in facilities to twitter / facebook / email / or whatever app.
it uses the built-in download facility for image downloading, and organizes the downloads into site-specific folders.