REWARDR sends a gift card, voucher, or QR code the moment a survey participant finishes — no plugin, no API integration, just the survey's own End URL setting. Works with LimeSurvey, Qualtrics, REDCap, Castor EDC, SurveyMonkey, and Typeform. Priced per participant (€0.75–€1.50), with a free trial covering your first 5 rewards.