Approximately 6 weeks for Bingo Card Creator (counting from launch and assuming my time is free). Appointment Reminder took longer -- off the top of my head, i

Approximately 6 weeks for Bingo Card Creator (counting from launch and assuming my time is free). Appointment Reminder took longer -- off the top of my head, it was cash-flow positive after about 3 months and had paid back R&D costs (exclusive of my time) after maybe 6ish.