ecohint·há 6 anos·discussYou can check episode E1088 of This Week in Startups for some ideas: https://www.youtube.com/watch?v=9OlrMNp90fc&t=1289s From 4:50 on the founder is taking about their transition from completely free to app with paid features.
ecohint·há 7 anos·discussDiscover, remember and share information to simply reduce environmental footprint. Feedback warmly welcome!