Those looking for an app to help navigate airport restaurants and bars will be disappointed as well, since Smart Layover doesn’t rate restaurants or make suggestions. It actually doesn't even list them; the map feature is extremely general. Other than security wait times, the usefulness of the app is pretty limited for when it comes to actually being in the airport.
Where we found the app to have some legs is for when it comes to getting outside of the airport during a long layover. Smart Layover has partnered with Groupon to allow travelers to browse and purchase tours and restaurant deals. A similar search function lists nearby hotels with discounted rates, although we found the amount of hotel options to be quite limited (for example, only one hotel came up during a search of JFK).
Since the app is free, it doesn’t hurt to have it as a back-up option, used for checking last-minute deals if you find yourself stuck in a city. Nonetheless, it is by no means a must-have and we wouldn't recommend relying on it for your upcoming layover. We love the concept of the app, though, but GateGuru is a much better download (and it's only grown since first launching in 2009).
Smart Layover said it is still working on adding new airports and building relationships, and we look forward to testing out the future versions.
[Photos: Smart Layover]