Open UI: The Ultimate Native iOS Client for Open WebUI

Open UI is a beautiful, native iOS client for Open WebUI. Connect to your self-hosted server and chat with any AI model you've configured — right from your iPhone. Built 100% in SwiftUI, Open UI delivers a fast, polished experience with features the browser can't match. STREAMING CHAT WITH RICH MARKDOWN Get real-time, word-by-word streaming responses. Messages render with full markdown — syntax-highlighted code blocks with copy buttons, tables, math equations, block quotes, headings, and more. Everything flows smoothly as it streams in with no layout jumps. LIVE CROSS-DEVICE STREAMING Start a generation on the website and watch it stream in real-time on the app, token by token. Regenerations, title updates, follow-ups, and completion events all sync instantly between devices. CHART RENDERING When the AI outputs chart data in code blocks (Chart.js, ECharts, Highcharts, Vega-Lite, or Plotly), it's automatically rendered as a beautiful native Swift Chart right in the conversation. Supports line, bar, area, scatter, bubble, pie, heatmap, and histogram charts. Includes a Chart/Source toggle to view the raw JSON data. HTML PREVIEWS HTML code blocks are now rendered as a live preview instead of raw code. Includes a Preview/Source toggle, fullscreen mode, copy button, share sheet, and dark mode support — all in a scrollable sandboxed webview. VOICE CALLS WITH AI Have a real voice conversation with AI. Open UI uses CallKit for native iOS call integration, with animated visualizations that react to voice, real-time transcription, and familiar call controls. It feels like a real phone call. KNOWLEDGE BASES (RAG) Type # in the chat to browse and attach knowledge collections, folders, and files from your server. Your AI responds using the context you provide — just like the web UI. WEB SEARCH & CITATIONS Toggle web search per message. Your AI searches the web and responds with numbered source citations, favicons, and tappable links. TOOLS Enable server-side tools per conversation. Tool calls render inline with expandable arguments, results, and status indicators. REASONING / THINKING DISPLAY See the full chain-of-thought from models like DeepSeek and QwQ. Collapsible "Thought for X seconds" blocks let you explore the reasoning process. TEXT-TO-SPEECH Choose from four TTS engines: • Marvis Neural Voice — on-device AI voice powered by MLX • Server TTS — your Open WebUI server's endpoint • System TTS — Apple's built-in voices • Auto mode — picks the best available engine SPEECH-TO-TEXT Two STT options: • Apple Speech — fast, private, works offline • Server STT — server-side transcription FOLDERS & ORGANIZATION Organize conversations into folders with drag-and-drop. Pin important chats, bulk delete, and search across everything. Collapsible time-grouped sections keep things tidy. THEMING Light, Dark, and System modes. Pick an accent color from presets or a full color wheel. Enable pure black OLED mode and tinted surfaces. A live preview card shows your theme as you build it. RICH ATTACHMENTS Attach files, photos, and documents. Paste images directly into chat. Share content from any app using the Share Extension. QUICK ACTION PILLS One-tap toggles below the chat input for web search, image generation, or any tool. Customize which pills appear. NOTES & NOTIFICATIONS Create notes alongside your chats with built-in voice recording. Get notifications when a generation completes and tap to jump right in. ADDITIONAL SETTINGS • Default model picker synced with your server • Send on Enter toggle • Streaming haptics — feel each token arrive • Temporary chats for privacy • Configurable silence detection for STT Open UI is open source and doesn't collect your data. Your conversations go directly to your server — nowhere else. Requires a running Open WebUI server instance and iOS 18 or later.