I work with independent medical spa owners who know their revenue but not their real margin. Most don't know which services, providers, or locations are actually profitable week to week. Spa Ledger fixes that: weekly P&L by service line, injectable COGS reconciled against Allergan and Galderma invoices, device break-even tracked against actual treatment volume, and deferred revenue from memberships separated from recognized revenue. $499/month. First month free. No setup fees. No long-term contracts.