Lucid vs ConstruxAi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lucid
This app offers a minimalist and intuitive note-taking experience, allowing users to organize thoughts with fluid, block-based editing. It features gesture-driven navigation and unique caret movement for efficient idea connection and management.
- Minimalist and intuitive design
- Block-based editing for organizing ideas
- Gesture-driven navigation
- Bookmark any section
- Unique caret movement with spacebar
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■ Beautifully minimal Intuitive & clean design that keeps you in the flow. A note-taking app that gets out of your way. ■ Connect ideas Organize thoughts as they form. Freely move and nest ideas with fluid, block-based editing. ■ Gesture driven • Swipe right to focus on any subsection • Swipe left to collapse a section • Navigate through parent blocks by swiping from the edge • Pull down to add a block at the top or tap empty space to add at the bottom ■ Other features • Bookmark any section, not just top-level notes • Easily move the caret between blocks by holding the spacebar (not possible in other outliners) ■ Roadmap Lucid is in early development and many more features are coming soon: • External links • Bidirectional linking • Desktop app & iCloud sync • More themes and customization options For the philosophy and reasoning behind the app, visit https://thelucidnotes.com/
ConstruxAi
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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/
Screenshots
Verdict
The clearest difference is in-app purchases: Lucid at none against ConstruxAi's 2. ConstruxAi's advantage is update cadence (every 2 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ConstruxAi sells 2 in-app purchases, starting at $19.99 per month. Lucid asks for nothing beyond the download.
Lucid ships an update every 2 weeks, ConstruxAi every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Lucid | ConstruxAi |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 2 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | illia chaban | CLIFFORD MICHAEL SYNER IV |
In-app purchases
Lucid
No in-app purchases
ConstruxAi
- ConstruxAi Pro$19.991 Month
- ConstruxAi Max$99.991 Month









