Developer Builds Immersive Love Letter App OpenWhen for Couples

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A developer has launched OpenWhen, a web app that allows two partners to create and exchange private love letters enhanced with mood, ambience, voice, and scheduled delivery. The project was inspired by a personal gift idea the developer had years ago but never completed, and a weekend coding challenge finally prompted its creation. Built with Next.js, Supabase, and ElevenLabs text-to-speech, the app lets users send letters that unlock at a chosen moment and trigger email notifications when ready. The design philosophy deliberately avoids AI-generated letter content, keeping the writing personal while technology handles atmosphere and timing. The app is live at open-when-web.vercel.app, with plans to add spell-check, real-time delivery, and support for more complex relationship structures in future updates.

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