Red Pen is free and open source on every surface, with nothing held back for paying users. It runs on one-time backing rather than rent. If it earned its keep, you can chip in through either door below, and your name goes up here. The perk is exactly that and nothing more: a permanent thank-you, with no early builds behind glass and nothing that switches off when you stop.
Names are opt-in. Back the project and tell us how you would like to appear, or stay anonymous. Either is welcome.
These are giving levels rather than prices. Every backer gets the same Red Pen, which is all of it. The level only decides how your name sits here. Recurring is possible on either platform, but the ask is always one-time: back a release, not a subscription. Tell us the name or handle you want when you chip in, and it goes up opt-in. Prefer to stay anonymous? That is welcome too.