The latest articles on DEV Community by Leeo (@hyunho_lee_e4373878e60f62). https://dev.to/hyunho_lee_e4373878e60f62 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3765607%2F3e000d49-7428-4b63-80e3-51f972f7bcb5.png https://dev.to/hyunho_lee_e4373878e60f62 en Leeo Wed, 11 Feb 2026 06:24:32 +0000 https://dev.to/hyunho_lee_e4373878e60f62/i-built-a-custom-keyboard-ios-app-heres-what-i-learned-about-keyboard-extensions-3f2m https://dev.to/hyunho_lee_e4373878e60f62/i-built-a-custom-keyboard-ios-app-heres-what-i-learned-about-keyboard-extensions-3f2m <p>Tags: </p> <p>As a solo iOS developer, I wanted to share some technical insights <br> from building Clip Keyboard — a custom keyboard extension for iOS.</p> <h2> The Challenge </h2> <p>iOS keyboard extensions are sandwiled. They have limited memory, <br> restricted API access, and users are naturally suspicious of <br> third-party keyboards (rightfully so).</p> <h2> Key Technical Decisions </h2> <ol> <li> <strong>No Full Access required</strong> for core features</li> <li> <strong>CloudKit</strong> for sync instead of custom backend</li> <li> <strong>Auto-categorization</strong> using regex + NLP patterns for 15 content types</li> <li> <strong>Combo Mode</strong> — sequential text injection with configurable delays</li> </ol> <h2> What I'd Do Differently </h2> <ul> <li>Start with fewer categories (15 was ambitious)</li> <li>Add onboarding sooner (users didn't discover keyboard setup)</li> <li>Focus on one killer use case for marketing</li> </ul> <p>If you're building keyboard extensions, happy to answer questions.</p> <p>🔗 <a href="https://apps.apple.com/us/app/clip-keyboard-quick-phrases/id1543660502" rel="noopener noreferrer">App Store</a> | Built with Swift &amp; SwiftUI</p> <p>blow redeem codes</p> <p>46AHKJETTMKA<br> KW6PERH4LEHK<br> HJELYERNMNYY<br> TWEWAELNRR9R<br> 3JP4LARJ9WTP<br> HELMTE7L767Y<br> F7NFAWRX9YPK<br> XANXWA6K4H6M<br> HRWFR6R4N6TY<br> 3YJJX6H4MFKP<br> 9K9J3J4J36MN<br> M3TMH6ARM3RH<br> NYLX6EXERHA9<br> TJ6TAXFNHNNT<br> MXF6XR93PF7X<br> A7XFEW6KL67X<br> X3PHRYYHRNY7<br> 4LK6F46LR774<br> KA7TN4YFYP74<br> A43MPJ9FP643<br> 4W63NHWJYTA7<br> XHENKTEFETAP<br> 9FX4X3J9HJE7<br> WHWFM3FA7WMJ<br> EFAERA47KNXM<br> 77F74JJ7NJMT<br> 73HM3TP466NA<br> 66AYNW9TL9F6<br> 3XRPL6XX7677<br> KXY6XPTKJMEJ</p> ios productivity swift showdev