Apple’s iOS 8 operating system causes popular apps to crash, according to a report. Apple’s iOS 8 operating system causes apps to crash about 3.3 percent of the time, or 67 percent more than last year’s version, according to a report by analytics firm Crittercism Inc.

Apps that have issues in aan updated iOS8 device innclude Facebook and Dropbox.

Crittercism said older iPhones experience the most issues. Andrew Levy, the firm’s chief executive officer, said Apple’s latest software includes more than 4,000 new functions and changes, and developers are struggling to adapt.

As with previous software releases, Apple will make fixes to its iOS 8 software in the weeks and months ahead, Levy said.

Apple’s iOS software came available to download last week and since then, 46 percent of devices connecting to the company’s App Store are running the latest version, according to Apple’s website.