Lumen vs ConstruxAi

Lumen is a browser with a memory. Most browsers forget the second you close a tab. Lumen does not. As you read, it quietly builds a personal knowledge base from the pages you actually engage with, and then lets you ask questions about any of it in plain English, answered by an AI model that runs entirely on your device. Nothing you read, nothing you ask, and nothing Lumen learns about you ever leaves your phone. WHAT IT DOES Lumen reads along with you. It distinguishes between pages you genuinely read and pages you opened and swiped away, and it extracts the meaningful content from the ones that stuck. That content gets summarized, embedded, and organized into a searchable knowledge base, all on-device. Later, when you want to find something, you do not have to dig through history or remember which tab it was in. You just ask: "What did I read about sourdough starters last week?" "Summarize that article about the new M-series chips." "What were the main arguments in that piece I read on Tuesday?" Every answer cites the pages it came from, so you can jump straight back to the source. AUTO-ORGANIZED Your reading sorts itself into a clean hierarchy: Topics, Websites, and Pages. Each level carries its own AI-generated summary, so you can scan what you have been learning at a glance. No tagging, no folders to maintain. Lumen handles it in the background. PRIVATE BY DEFAULT Lumen has no server. There is quite literally nothing to send. On-device LLM: a quantized Llama 3.2 model runs locally through Apple's MLX framework. Local SQLite storage: your reading history, summaries, and embeddings never leave the device. Built-in privacy: tracker blocking, third-party cookie blocking, and fingerprint resistance. Secure: HTTPS-only by default, with mixed-content blocking. No strings attached: no accounts, no sync, no telemetry, no ads. The AI weights download once on first launch (~700 MB). After that, everything works fully offline: browsing, reading, asking, answering. BUILT FOR iOS Lumen is written from scratch in Swift and SwiftUI, designed specifically for iPhone and iPad. It uses Apple's own frameworks wherever it can: NLEmbedding for semantic search, WKWebView for browsing, SQLite with FTS5 for full-text queries, and MLX Swift for on-device inference. Zero third-party trackers. Zero external services. WHO IT'S FOR While most browsers treat the web as a feed to scroll past, Lumen treats it as a library worth keeping. If you read a lot online and constantly think "I know I saw something about this recently but I cannot find it again," Lumen is for you. Researchers, students, writers, developers, and lifelong learners. You do not need to change how you browse. Browse normally, and Lumen takes care of the rest. REQUIREMENTS iOS 18 or later. iPhone with Apple Silicon recommended for the fastest on-device AI performance.

ConstruxAi is an AI-powered building-code research assistant. Ask a question in plain English and get a clear, cited answer grounded in current U.S. model codes (the 2024 I-Codes and the 2023 NEC) — then tap any citation to jump to the referenced section number, title, and a supporting excerpt. Made for builders, contractors, electricians, plumbers, HVAC techs, architects, engineers, code inspectors, and informed homeowners. WHAT YOU CAN DO • Ask in natural language, like 'PEX support spacing for horizontal runs?' or 'Minimum deck ledger requirements?' • Look up sections directly, like 'IRC R507.9' or 'NEC 310.16,' with section titles, supporting excerpts, and referenced tables • Filter your search to a specific code (IBC, IRC, IPC, IMC, IFGC, IFC, IECC, and more) • See the evidence — every answer shows the sections and cross-references that support it • Ask follow-ups in a multi-turn conversation that keeps context CODES COVERED 2024 editions of the IBC, IRC, IPC, IMC, IFGC, IFC, IECC, and IEBC, plus the 2023 NEC (NFPA 70) — tens of thousands of sections, searchable in seconds. PRIVATE BY DESIGN Sign in with Apple only — no passwords to manage. We never track you. Delete your account anytime from Account → Delete account, which permanently removes your profile, chat history, and billing records. PLANS • Free — code search with 3 messages per month • Pro — 150 messages per month, priority search, and chat history ($19.99/month) • Max — 1,000 messages per month with faster responses ($99.99/month) ConstruxAi Pro and ConstruxAi Max are auto-renewable subscriptions. Payment is charged to your Apple ID account at confirmation of purchase. Your subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage your subscriptions and turn off auto-renewal in Apple ID Account Settings after purchase. Prices may vary by region. IMPORTANT ConstruxAi is an independent AI reference and productivity tool. It is not affiliated with, endorsed by, or sponsored by the ICC, NFPA, or any code-publishing or regulatory body, and it does not provide official code text, legal advice, or a compliance determination. ConstruxAi shows AI-generated summaries and excerpts and does not reproduce complete official code text. AI answers can be incomplete or incorrect — always verify against the officially adopted code and your local authority having jurisdiction (AHJ). This disclaimer is also shown in the app. Privacy Policy: https://bepc-codex-gateway-production.up.railway.app/legal/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/