Postmark

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  Postmark

Inspiration

Most digital memories disappear into feeds, folders, or chat threads. We wanted to explore what happens when a message doesn’t just arrive on a screen, but arrives in a place. Postmark was inspired by the emotional weight of physical postcards—short, personal, and meant to be kept—and by the idea that spatial computing can make digital memories feel grounded and present rather than ephemeral.

What it does

Postmark lets you send spatial memory postcards.

A sender captures a photo and records a short voice message. Postmark automatically generates a postcard combining image and text. The recipient places that postcard in their physical environment—on a fridge, wall, or desk. When they look at it, the image comes alive and the voice message plays. When they look away, it stays quietly in place.

How we built it

We built Postmark using spatial anchoring, image capture, and voice recording in an AR environment. The system packages each postcard as a lightweight asset containing an image, audio clip, and metadata, which is uploaded to the cloud and shared via a secure link. On the receiving side, postcards are anchored locally and activated through gaze-based interaction, with spatialized audio for presence.

Challenges we ran into

• Making spatial anchors feel stable on everyday surfaces
  
• Designing gaze-based playback that feels intentional rather than distracting
  
• Balancing simplicity with emotional expressiveness in the postcard design
  
• Ensuring audio playback feels intimate without being intrusive
  

Accomplishments that we're proud of

• A complete end-to-end flow from capture to placement
  
• A postcard interaction that feels calm, not noisy
  
• Gaze-triggered audio that reinforces presence instead of demanding attention
  
• A concept that consistently resonates emotionally in demos
  

What we learned

Spatial computing works best when it respects attention. The most meaningful interactions aren’t persistent animations or overlays, but quiet objects that wait. We also learned that voice—especially when tied to place—creates a much stronger sense of connection than text alone.

What's next for Postmark

Next, we want to explore shared anchors across devices, collections of postcards as spatial memory walls, and richer visual treatments that subtly respond to time and light. Long-term, Postmark could become a new kind of communication layer—one where messages don’t scroll away, but stay exactly where they matter.

Built With

• lensstudio
• supabase
• typescript