Currently, I am not aware of any such app/service that is available for the U.S. right now. I did take a look through Google's Play Store and saw 2 or 3 apps that have a similar model, but they didn't look any good. I probably wouldn't trust them with my payment info as a user.
I am also not aware that TGTG is planning to bring their service to the U.S. any time soon. So I come here today, wondering if there is an unfilled niche right now. Are there really tons and tons of good food going straight to the garbage when I'm here in California avoiding eating out due to the often unstomachable prices for what you get? Tons of good food that probably aren't going to people who need it the most and can't afford it because the incentives aren't there for restaurants to donate it? I've certainly never heard of stuff like that being done around here.
I don't have the brains to make such an app/service, but you guys on HN might, so I'm making this post to spread some awareness and maybe spark some inspiration. Could it work? Would restaurants and shops sign up for it?
[0] - https://toogoodtogo.com/en