What works locally
SnapAction uses SwiftData to store resource cards, scan records, tags, screenshot links, favorite state, and read state on the iPhone. That local library is the place where analyzed screenshot resources become searchable and browsable.
The app can preserve the structured output after a scan: title, resource type, URL when found, metadata, tags, and references back to the original screenshot asset IDs.
What requires network processing
Scanned screenshots are sent to SnapAction’s backend for AI analysis. The Convex-backed agent uses OpenRouter to understand screenshots and can use Serper search to find canonical URLs when the screenshot does not show a full link.
That means SnapAction should not be described as fully offline, fully on-device, or as a tool where screenshots never leave the device. The accurate framing is local organization with cloud-assisted analysis.