Apple's iOS mobile operating system has long been touted as being more secure than Android because of the company's tight control over both hardware and software. That closed ecosystem means routine security updates get pushed to users quickly and apps are well-vetted before they're offered up for download.
Android, meanwhile, tends to be more fragmented across a variety of smartphone makers, who don't usually roll out updates to users as quickly as Apple. And its open-source nature can allow security gaps to creep into apps -- especially those downloaded from questionable sources.
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