ComScore, a leading digital metrics company, today released its metrics for July of this year, comparing its numbers to those from April of this year. As expected, Google and Apple continue to dominate the smartphone market with their iOS and Android platforms, while RIM’s Blackberry OS continues its slide toward irrelevance.

According to ComScore, 114 million Americans now own smartphones. Of these smartphones, they estimate that 52.2% of them run a version of Google’s Android OS, a slight rise from April’s 50.8%. As proof that Apple’s iPhones are still what people want if they can get them, Apple’s iOS platform rose 2% from April to now run on 33.4% of U.S. smartphones.

As seen in the chart above, RIM’s Blackberry OS is still the third most pervasive smartphone platform, though it continues to fall in popularity. Blackberry OS has lost nearly 4% of its smartphone platform market share since February. The company is hoping that the release of its Blackberry 10 platform and hardware will turn around its fortunes, but RIM’s new OS isn’t coming until next year.

When it comes to hardware, Apple seems to still be selling iPhones at a fast pace. Their share of the combined smartphone and non-smartphone mobile market rose 1.9% to sit at 16.3%. Of course, two other manufacturers top that percentage by selling lower-end smartphones and feature phones. LG holds 18.4% of the mobile market while over a quarter (25.6%) of U.S. mobile subscribers carry a Samsung phone.