I updated and published Theme Tester in the Play Store. The new update brings several changes. First, the "concepts" screen is replaced by the "More Apps" screen, where you can see other apps made by me. Next, I removed the theme options in the "preferences" page, but I kept some sample items in there. The theme options were faulty and didn't work right and had to be removed. I also removed my custom action bar (and split action bar) backgrounds so that themers can preview their backgrounds without mine interfering. Here's a quick peek at what is being updated in the app.