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Portfolio
Mobile Applications
Independent mobile applications and utilities built and maintained by Osman Veli Koç.
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Only Flags
World Flag Quiz
A fast, distraction-free trivia game to test your knowledge of world flags.
World Flags Collection
Quiz Gameplay Modes
Global Leaderboards
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Sound Meter
Real-Time Sound Level Measurement
A simple, distraction-free utility for measuring ambient sound levels in real time.
Real-Time Sound Measurement
Clean Utility Aesthetic
100% On-Device Processing