How Evan Crawley built the viral phone-to-phone QR file transfer in one night with Claude Code
n3rder · reddit · 2026-10-02
Two months ago, a demo of sending files between phones via a stream of QR codes went viral (7.6k upvotes). Blogger AppMunchies interviewed creator Evan Crawley about how it came together:
- The transfer method wasn't the goal — he was building an offline MP3 player to send music to his wife's iPhone. Safari blocked direct file receiving and he refused to rely on a server.
- Claude initially said it couldn't be done without a server; Crawley landed on QR codes, and Claude Code produced a working prototype quickly. It worked around 2 AM.
- It exploded on Reddit but got zero traction on Hacker News until someone else reposted it hours later.
- Commenters noted prior similar projects, but he believes his method wins on speed.
Key takeaway: the most interesting part of your project may be a component, not the finished product — this 4-hour side build got more attention than projects he spent far longer on. Full interview on the AppMunchies YouTube channel.
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