我在纵横上就只和家人分享位置，和更多的朋友分享则用签到服务。

As for me, I only use Latitude with family. I use check-in apps with a wider group of friends.

youdao

这个产品和现在流行的Foursquare地理定位服务不同，它可以让你在某个地点“签到”，然后会给你这个位置附近的好友发送消息。

The product is not unlike the popular Foursquare location-based service, and lets you “check-in” at a place and send a notification to your friends who are nearby.

youdao