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Hi HN! We’re building an automatic donation app, Momentum, that connects your giving to your life. For example, when you go out to eat, automatically add 10% to your bill and donate it to someone in need of food. Every time Trump tweets, give $0.10 to the ACLU (you can set a limit). Donate to global health with every mile your friend runs. Or help fight the attention economy whenever a HN post gets 500+ upvotes. The app tracks your impact (like pounds of carbon offsets or lives saved) so you understand how you’re making a difference. We’ve built collections of high-impact organizations from independent evaluators, and you'll be able to give to any of your favorite nonprofits in the country in an upcoming version.

The app is in beta as we finalize some core features and completely redesign it before launching it in late-November. To try it out, download it from the App Store (https://givemomentum.app.link/showhn).

A bit more context: Before Momentum, we helped run Dan Ariely's behavioral science accelerator and a donation psychology research program at Duke, and one of us founded two other companies (one YC W14). We’re building a research program on giving led by Dean Karlan and are working with a range of researchers and nonprofit evaluators. If you’d like to get in touch, you can email us at founders@givemomentum.com - we’d love to hear what you think of it so far!