You may already be familiar with the 500px photo sharing service, both in its web form and the official iOS app. If you're a fan of the latter, you'll be dismayed to learn that the app has been pulled down from Apple's App Store over concerns that it allows users to search for nude photos too easily, according to TechCrunch. Another 500px browsing app called ISO500 -- which 500px just acquired, as a matter of fact -- has also been removed today for the same reason.
In speaking with TechCrunch, 500px COO Evgeny Tchebotarev explained that after submitting a recent update to its flagship app,
