Top of the Lot

This week’s app round- up is for newlyweds, amateur singers and fitness fanatics. Make your smartphone smarter with these apps.

Sing brings karaoke to your mobile phone and lets people from all over the world join you. WedPics collects all the pictures your friends took on your special day and puts it together in one big album.

Cardiio turns your phone’s front camera into a biosensor that measures your heart rate.