Space Place Prime

What it is: a viewer app for the spaceplace.nasa.gov website.

What you do with it: the items (pictures, texts, videos) can be browsed in three modes: list, linear (chronological) and 'infinite looping grid'. Click on the icon to view the content (read an article, view photos or videos). The items can be shared (e-mail, Twitter, Facebook).

What we liked: excellent content, great educational value.

What we didn't like: poor browsing and discovery options (in the 'loop' mode the items are presented randomly, there are no categories, tags, search, age filtering etc). The bookmarking feature is very basic.

Appysmarts