Marketing site · SEO + i18n

Sealcloak

Marketing site for Sealcloak, an offline photo and file vault for Android, in 11 languages.

Case studyMarketing site

Node.js buildHTMLCSSJavaScriptVercel

Problem: A privacy app that never touches the internet still needs to be found. The site has to rank for specific searches, like hiding photos on a particular phone, in many languages, and load fast.
Who it's for: Android users looking for a private, offline vault, and people comparing vault apps.
Design decisions: A dark, calm look that reuses the app's own colours, real phone screens in the hero, clear proof points (no account, no internet permission) and comparison pages against other vault apps.
Technical decisions: No framework. A Node build script renders every page in every language with a shared header and footer, guide lists, language links, sitemap.xml and robots.txt. Vercel runs the build on each deploy, so only sources are committed.
The hard problem: Eleven languages from one source, including right-to-left Arabic and scripts that need their own fonts (Bengali, Japanese, Korean, Vietnamese), with correct hreflang links between every version of every page.
Result: A multilingual site with feature and comparison pages, each with its own Open Graph image, and a publishing routine for SEO guides driven by Search Console data.

How it's built

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