While some apps use a mile long feature list to attract users, there are others that use a very opposite approach. They use simplicity, subtlety, and effectiveness as their calling card. One such app is DuckDuckGo for Android: a search app that bases its entire existence on privacy and efficiency.
On the surface, DuckDuckGo is not unlike other search engines - type in what you're looking for and get your results. Easy peasy. Under the hood, though, is where things work a little bit differently. DuckDuckGo uses crowdsourcing as its go-to method of providing legitimate information. Not only that, but it boasts "real privacy" as one of its flagship features - clearly a shot at Google.
Another very nice feature of DDG is zero click information. It provides near-instant results for most searches, so you never have to click a link to get a quick answer. If you enter something vague, it will provide you with a list of choices in order to refine the search to give you the best answer possible.