FocusLock — Premium Landing Page

FocusLock's web presence — a premium Next.js 16 landing page built for conversion and SEO in two languages

A mobile app is only half of the product. The other half is the landing page that convinces a visitor to download it. For FocusLock — a professional-grade concentration operating system — we built a premium web experience on Next.js 16 (App Router) and React 19, with full internationalization, a production-grade SEO layer, and a visually consistent dark design that matches the app's identity from browser to home screen.

The technology and architecture

• Modern stack: Next.js 16 with App Router, React 19, TypeScript, and Tailwind CSS 4 — the contemporary stack for performant, maintainable marketing sites that feel fast on every device.
• Full internationalization: complete FR/EN support via next-intl, with localized routing (/fr, /en), language detection, and clean URL structure for both SEO and shareable links.
• Exclusive dark theme: the brand identity requires dark-only design. We enforced this at the architecture level via next-themes with the light theme deliberately disabled, keeping every touchpoint on brand.
• Optimized SEO: dynamic Open Graph metadata, OG images generated on the fly through Next.js API routes, language-specific SEO, and canonical URL handling for each locale.

The main features of the site

• Premium landing page: a modern dark design with smooth animations and sections engineered for conversion — hero, social proof, feature tour, testimonials, final CTA.
• Lead capture form: connected to n8n for automatic routing of new leads into the marketing funnel, without any manual handling.
• Complete legal pages: privacy policy, terms of use, cookies, legal notice, security, compliance, DPA, GDPR and CCPA rights, acceptable use policy. A mobile app that handles focus data and integrates deeply with the OS is held to a high legal bar, and the site reflects that.
• Information pages: service status page, contact, FAQ, support, downloads — each one indexed and optimized individually for discovery.
• Custom error pages: 404, 500, and other HTTP error codes, all designed in the same visual language so an error screen still feels like part of the product.
• Responsive design: every breakpoint is tested and polished, from narrow Android devices to wide desktop monitors.
• Performance optimizations: Server Components for static pre-rendering, automatic image optimization, lazy loading, and code-splitting, so every page meets modern Core Web Vitals thresholds.

Technical architecture

• Modular structure with clear separation between landing, layout, and UI components.
• Server Components for static pre-rendering, with explicit translation loading for each locale — avoiding the common pitfall of shipping duplicate translation bundles to the client.
• Client Components for interactive islands, using the useTranslations() hook from next-intl to access localized strings cleanly.
• Vercel configuration tuned for optimized deployment: preview environments per branch, edge caching, analytics integration, and automatic image optimization at the CDN layer.
• Environment variables for every integration (n8n webhook URLs, download URLs per platform, support endpoints, concierge contact), so no secret ever leaks into the repository.

Advanced internationalization

• Complete, linguist-reviewed translations across every page and section.
• Language-specific SEO with metadata adapted per locale — not just mechanically translated, but rewritten to match search intent in each language.
• Dynamic Open Graph images generated via API routes, producing visually rich link previews in both French and English on social platforms.
• Transparent localized routing that preserves user intent across language switches — switch from /fr to /en on the pricing page and you land on the pricing page, not the home page.

What this project demonstrates

This landing page is a showcase of what a modern web presence should look like in 2026: a Next.js 16 App Router architecture, React 19 server components, a strict internationalization strategy, real technical SEO (not just meta tags), and a premium visual language that is consistent from the app icon to the legal footer.

Technology stack

• Next.js 16 (App Router) and React 19.
• TypeScript for end-to-end type safety.
• Tailwind CSS 4 for the design system.
• next-intl for internationalization and localized routing.
• next-themes for enforced dark theme.
• Server Components for performance and SEO.
• Vercel for deployment and edge caching.
• n8n for the lead-capture pipeline.

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