The problem is quietly universal: adults accumulate a constant influx of important documents (passports, insurance policies, leases, IDs) and have no reliable system to know when they expire. The HN thread "Ask HN: How do you manage your personal documents?" captures it directly - someone getting older, struggling with the seemingly constant influx of 'important' documents. Missed renewals mean lapsed insurance, expired passports discovered at the airport, and auto-renewing leases that catch people off guard.
DocVault is a mobile app that scans, classifies, and tracks expiry dates on personal documents. You photograph a passport or insurance card, OCR extracts the document type and key dates, and the app schedules proactive alerts (90, 30, and 7 days out) before anything expires. The core wedge is not storage - it is the expiry intelligence layer that FileThis and generic scan apps do not focus on.
MVP: a mobile scan flow, on-device or cloud OCR to pull dates, a document-type classifier for common categories (passport, driver license, insurance, lease, warranty), and a reminder engine tied to calendar and push notifications. Ship with a handful of templates for the highest-value document types.
Revenue: freemium with a low document cap on free, then a subscription (roughly $3-6/mo) for unlimited documents, multi-member household vaults, and export/backup. The revenue comparables here (Rezi ~$2598/mo, Kibu ~$2343/mo, Kitze ~$2233 in 30d) show that small, focused B2C tools reach a few thousand a month - a realistic near-term target, not a venture outcome.
GTM: launch on HN and productivity subreddits where the exact pain is already voiced, target life-event moments (moving, new job, having a child) via content and SEO around 'when does my passport expire' style queries. Growth loops: household sharing invites (one member adds the family), and recurring re-engagement from the alerts themselves, which pull users back into the app on a natural cadence tied to real renewals.