A workout habit tracker sounds like it should log sets, reps and minutes on the treadmill — but that's not actually the fragile part of training. The fragile part is showing up in the first place; once you're at the gym or on the mat, the workout mostly takes care of itself. So this tracker treats "worked out" as a plain yes or no (or a few-times-a-week target), the same way it treats brushing your teeth, and leaves the actual programming to whatever plan you already train from.
That's a deliberate trade-off, not a missing feature: mixing "did I train" with "how much did I lift" tends to turn a simple habit into a spreadsheet, and spreadsheets are where good intentions go to die. What you get instead is your training rate over time (3 out of the last 7 days, say) rather than a streak you're terrified of breaking — because the moment training becomes about protecting an unbroken chain, one bad week and it's the "well, that ruined it" thinking that gets people to quit, not the missed session itself. Set the trigger to something concrete ("after I get home from work, I change into gym clothes") if getting out the door is the actual battle. Just try it — add "workout" as one of your three free habits and see what your honest rate looks like this week.