Apple Timer
Twist the apple to set a focus block. The countdown sits in your menu bar, and when it ends an orchestral fanfare plays and a plane tows BREAK TIME across your screen, even with the window closed. Keep the apple floating on your desktop or tucked away.
Coming soon
This one is still being built. It will be $1 when it's ready.
Not digitally signed. This app is not signed or notarized by Apple, so macOS warns you the first time you open it. It takes one extra step to allow it. See how.
One-time purchase. Re-download any time from your library. First launch needs one extra click; see Install help.