Gravity is a minimal notes app built on Andrej Karpathy's append-and-review method: everything goes into one stream, and you swipe whatever still matters back to the top. No account, no folders, nothing to file.
It runs on iPhone, Mac and Android, is a one-time purchase rather than a subscription, and positions itself as a calm home for thoughts - 'no fluff and does what I want' is the review it leads with.
