The website is the old version of James Porter's Projects and Writings. You can find the new version here.
Rhythm is the meditation timer and scheduler I couldn't find.
It is simple: quickly select a duration (perhaps with some bells to recall your attention) and hit start. You can also set reminders (along with default configurations) to help establish a meditation practice.
You can see completed meditation sessions in your Log. And that is it (mostly). I hope you find it useful.
On iPhone and iPad.