It's hard to say this without being so negative, but I really have to wonder if any of these apps have even been tested on an Android device. Because to be quite frank, they are absolutely terrible. Here's what I tested:

- Calculator. Whenever I press a number, it takes a second to be actually reflected in the user interface. If I try to press anything in rapid succession, the entire view zooms in. After this the entire size and scale of the user interface keeps shifting randomly. Completely broken.

- Wikihow. This is just a wrapper on their mobile site with an ugly search bar on top. Long pressing a link shows a context menu that lets me "open in a new tab" but there's no tab switcher to be found. I can select text by tapping and holding but can't figure out how to copy.

- Wikipedia. Pretty much the same. Scrolling performance is strangely atrocious considering that it works fine in Firefox for Android. Pressing the back button on the device boots me out of the app instantly instead of, you know, going back.

And all in all, they are all just slow and clunky. It feels like browsing a web page or using a web app in a mobile browser that just isn't up to the task.

In between this aim on building a more open platform for apps, there doesn't seem to be any focus in building apps or user interfaces that people would actually want to use.