iOS
N/A
iOS
iOS · N/A · iOS · eye-oh-ESS · iPhone OS · Apple iOS · Operating Systems · mobile · apple · everydayOperating SystemsiPhone OS Apple iOS/eye-oh-ESS/
Also known as: iPhone OS, Apple iOS
Last updated August 9, 2026
Definition
iOS is Apple’s operating system for iPhone (and related software family for iPad). Apps come mainly from the App Store with Apple’s review process.
Real-World Example
Updating iOS in Settings → General installs security fixes and new features for an iPhone.
References
Related terms
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