The Cupertino, Calif.-based tech giant buys the company behind TestFlight, continuing its trend of acquiring small companies to add to its technical war chest.
Apple says iOS users will be better able to search for and browse through categories and subcategories of apps.
Many of the features in Apple's latest mobile operating system appeared first in Google's OS.
Most of Apple's developer services have been unavailable for a week, leaving some app makers in a lurch.
Apple's latest OS for the iPhone and iPad heaps on the features, but makes more minimal changes compared to last year's OS overhaul.
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