BillSplitGhost: Shared Expense Drift Auditor
Automatically detects when shared expense splits become unfair over time and alerts roommates/groups to rebalance before resentment builds.
The Problem
Shared living situations (roommates, co-working spaces, friend groups) track expenses in apps like Venmo or Splitwise, but nobody notices when one person has gradually started covering more than their fair share. By the time someone realizes it (often months later), hundreds or thousands in imbalance accumulate, creating awkward conversations. Most expense apps show totals but don't proactively warn about drift.
Target Audience
Roommates (18-35), co-living communities, friend travel groups, startup co-founders splitting operational costs, small business partners splitting overhead
Why Now?
Co-living and shared economy are exploding post-pandemic; people are more aware they need tools but existing expense apps are passive. AI can now cheaply detect patterns that would require manual auditing before.
What's Missing
Existing expense-split apps are transaction loggers, not predictive monitors. They tell you what happened, not what's becoming unfair. Nobody has built the 'drift detection' layer on top of expense data.
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