HandBanner

HandBanner is a professional handheld LED marquee for iPhone, engineered for visibility, configurability and offline reliability. DISPLAY ENGINE • High-FPS marquee renderer with continuous loop • Pixel-accurate width measurement for seamless scrolling • 8 display fonts: System Bold, Rounded, Serif, Mono, Heavy, Italic and more • Font size scalable from 60 pt to 320 pt • Full RGB color picker for both text and background • Optional neon glow with dual-layer halo MOTION CONTROL • Scroll speed: 20 px/s to 500 px/s, fully linear • Three directions: left-to-right, right-to-left, static • Blink mode with adjustable interval (0.2 s – 2.0 s) • Frame-locked animation for stable preview at any speed AMBIENT EFFECTS • 7 particle systems: snow, sakura, hearts, stars, bubbles, ribbons, fireflies • Density tunable from 10% to 100% • Independent layer over text, GPU-friendly SCENE PRESETS • 6 one-tap presets: concert, birthday, airport pickup, proposal, cheer, warning • Each preset bundles font, color, speed, motion and decoration in one shot FULLSCREEN STAGE MODE • Hides system overlays • Disables idle timer (screen stays on) • Supports portrait and landscape • Tap to toggle controls, double-tap to exit DATA & PRIVACY • Last configuration auto-saved (UserDefaults JSON) • 100% offline — no servers, no analytics, no SDKs • No permissions required • Trilingual UI: English / 简体中文 / 日本語 USE CASES Live concerts, fan events, airport pickups, weddings, proposals, sports games, parties, surprise greetings, on-stage announcements, public service signage. Built for performance. Designed to be seen.