Hey Product Hunt! 👋 I’m the founder of Monolithik, and today we’re launching Cairn. I built this tool to solve a massive, quiet problem in the short-term rental space: platforms are increasingly denying legitimate host damage claims due to "unverifiable evidence." The Technical Problem: When turnover cleaners take checkout photos on their phones and send them via SMS or WhatsApp, the underlying EXIF metadata (timestamps and strict GPS coordinates) is completely stripped out by the platform's compression. When hosts submit those files, the resolution center sees zero tracking data, assumes the photo is manipulated, and denies the claim. The Solution: Cairn acts as a completely local evidence vault. • It utilizes native Apple APIs to lock strict EXIF metadata and GPS coordinates directly into the file at the moment of inspection. • It instantly compiles a side-by-side, timestamped PDF report that complies exactly with strict platform verification standards. • It runs 100% securely via your own iCloud. We never see your data or host your property photos on third-party servers. If you manage properties or just appreciate highly focused utility apps, I’d love to hear your feedback on the UI or answer any questions about the metadata locking architecture!

Cairn

The STR evidence vault. Stop losing AirCover claims.

The STR evidence vault. Stop losing AirCover claims.