A gratitude habit tracker could turn into homework fast if you let it. Gratitude journalling has decent evidence behind it, but most people who try it stop within a few weeks — not because gratitude doesn't work, but because writing three fresh things every single day gets surprisingly hard, and staring at a blank line feels like homework. The habit that actually needs protecting is much smaller: did you stop and notice something today, yes or no. What you noticed doesn't need to be written down anywhere, and it definitely doesn't need to be original.
So this tracker treats gratitude the same way it treats any other habit — a daily (or few-times-a-week) tick, a trigger if you want one ("after dinner, I think of one good thing about today"), and a rate over time instead of a streak to protect. That last part matters more here than it sounds: gratitude practices are exactly the kind of thing people abandon completely after one skipped day because it "doesn't count anymore," which is precisely the all-or-nothing thinking that kills habits in general. Miss a day, don't spiral, come back tomorrow; missing two in a row is the actual thing worth paying attention to. Just try it: set gratitude as one of your three free habits and see if the tick alone (no list-writing required) is enough to keep it going.