A reading habit tracker sounds like it should be about counting pages, but that's not actually the useful bit. Most people who say they "want to read more" don't have a reading problem — they have a picking-the-book-back-up problem. The habit isn't finishing a 900-page novel by December, it's whether you opened any book at all today. That's a much smaller, much easier thing to track (and, not coincidentally, the thing that actually turns into finished books over time).
So this tracker doesn't ask how many pages or minutes you read (there's no field for that, on purpose) — it just asks yes or no, and shows you the rate over time. If reading tends to slip on weekdays and hold up at weekends, set it as 4x/week instead of daily and stop pretending otherwise. Pair it with a trigger if mornings work better than evenings ("after I make coffee, I read for a bit") — the anchor does more of the work than willpower ever will. One missed day changes nothing; two in a row is the pattern worth noticing, which is why the rate matters more than a streak ever could. Just try it: add "read" as one of your three free habits and see what your actual rate looks like after a week (it's usually lower than people guess, and that's fine — now you've got a number to move).