WelfareCalc.ch is a free, anonymous and privacy-first web tool suite for Swiss residents and expats. It includes three core utilities: a Swiss Social Benefits Calculator for AHV, IV, EL and other social insurance estimates; a Rental Contract Scanner to analyse tenancy agreements and highlight unfair or illegal clauses; and a Dental Bill Auditor to check dental invoices via the official Swiss TARMED point system. The platform supports 11 languages for easy access across international users.