Tech Five: Yelp shares surge, Square stumbles

Shares of Yelp are climbing in Friday trading, while a large quarterly loss for Square is pushing its stock price lower.

Let's look at tech stocks to watch Friday:

Yelp. Shares of the online recommendations service jumped 17% Friday after raising guidance on full-year revenue, reports The Wall Street Journal. Yelp also beat the Street on first quarter earnings and revenue.

Square. A first-quarter loss that was bigger than Wall Street expected sent shares of the mobile payments company down Friday. The loss is tied to Square's operating expenses, which surged 72%.

Activision-Blizzard. Shares of the video game publisher rose after the company boosted its revenue and earnings outlook for the 2016 calendar year. Activision-Blizzard topped Wall Street forecasts for earnings and revenue during the first quarter.

Apple. The tech giant is partnering with German software company SAP on business apps for the iPhone and iPad. Apple has struck a similar deal with IBM. The deal calls for SAP to create enterprise apps for Apple's iOS operating system.

Netflix. The streaming media company is adding cellular controls to allow users to control how much data they use when watching movies or TV shows. It's available on iOS and Android.

Follow Brett Molina on Twitter: @brettmolina23.