Periscope’s app is slipping beneath the waves. It has steadily dropped from No. 23 on the overall iOS app charts in January to No. 441 this weekend. Now Twitter is adding Periscope’s live streaming ...

Sharing great moments (or just snippets of your life) with friends or loved ones has never been easier, and a new class of live streaming app makes it possible for them to join you in real time. Of ...