Patent troll says it owns GPS, sues Foursquare

Patent trolls continue to take it to young companies with a vengeance. This time, a shell company that claims to own basic navigation technology wants the maker of a popular location-based “check-in” service to pay up.

Patent troll stalks travel site Hipmunk

Hipmunk’s quest to “take the agony out of travel planning” has won plaudits from users and the media and earned the start-up a new $15 million investment. Now, a patent troll wants Hipmunk to give it a piece of the action.

Hipmunk adds calendar integration to mobile apps

Travel booking startup Hipmunk is rolling out updated versions of its mobile apps, which will automatically take into account events that are already on your calendar when trying to book travel. It works through integration with calendars such as Microsoft’s Outlook, Google Calendar and Apple’s iCal.

Hipmunk comes to Android with a surprisingly slick app

Hipmunk, the San Francisco-based travel search startup, has finally brought its travel search application to the Android operating system. Hipmunk for Android, which for now only facilitates flight searches, is impressive because it retains all the slickness of the company’s web and iOS offerings.

Building a mobile app? Here are 6 tips for you

The mobile apps and services founders speaking at Mobilize 2011 this week gave some great advice for startups to follow. We picked out some of the best tips from Pandora, Flipboard, Instagram, Hipmunk, Formspring and Grey Area.

The 3 don’ts of high-engagement apps

At the Tuesday afternoon Mobilize panel on how to keep people coming back to your mobile app, panelists from a variety of services like Hipmunk, Formspring, ngmoco and Yahoo agreed that there were three things you should avoid doing if you want to create high-engagement apps.

How mobile changes the web travel business

Mobile is turning travel on its head, and much like it’s changing the way thousands of other companies do business, it’s also changing how Expedia thinks about its product. Instead of searching and booking travel, a mobile device can provide a concierge-like level of service.

Hipmunk knows you’re addicted to the web

Hipmunk, the hot flight-finding service, has added in-flight Wi-Fi as a new metric for travelers. Sure, this is an indication of how deep the web has sunk its talons into us, but working on flights has become pretty much the standard in many offices.