A journaling habit tracker could easily have turned into another journal (a text box asking how your day was), but that's a different product solving a different problem. What most people who "want to journal more" actually struggle with isn't what to write — it's whether they open the notebook (or the app, or the blank page) at all. So this tool doesn't ask what you wrote, doesn't store any of it, and doesn't care if today's entry was three paragraphs or a bullet list you forgot about by lunch. It just asks: did you journal today, yes or no.
That's deliberately shallow, and the shallowness is the point — a tracker that judged the content of your entries would add exactly the kind of pressure that makes people stop journaling in the first place. Set it daily, or 4x a week if that's realistic for you, and pair it with a trigger ("after I get into bed" is a common one) so it's the routine doing the work, not your memory. Watch the rate rather than a streak — a bad week won't zero you out, and missing two days running is the actual signal to reset, not one. Just try it: add journaling as one of your three free habits and see how the habit holds up once nobody's grading the entries.