Score your energy for the morning, the afternoon and the evening, optionally type in your class schedule, and the tool ranks the three parts of the day from best study window to worst. It is for anyone who keeps planning to revise at 2pm and then stares at the same paragraph for forty minutes.
Three windows are fixed in place: 6am to 12pm, 12pm to 5pm, and 5pm to 10pm. You give each one a score from 1 to 10, they come back ranked, and each gets a ten star rating so you can see the size of the gap without reading the numbers.
Enter your class schedule and energy levels to find the best time slots for studying each day.
How the ranking is built
The three scores are compared and sorted highest first. That is the whole engine: no history, no sleep research, no peek at your calendar. The top of the list is whichever window you scored highest and the bottom is whichever you scored lowest.
Output arrives as three blocks in order. Each carries its rank, its window name, the clock range, and a row of ten stars where the filled ones match your score, plus the raw number out of 10 so nothing depends on you counting symbols. Left at the defaults of 7, 5 and 8, the order comes back Evening first, Morning second, Afternoon third.
If you typed a schedule into the top box, a tip line appears underneath repeating it back and telling you to avoid those hours. Leave the box blank and no tip line shows at all.
Three runs with real numbers
Defaults untouched: morning 7, afternoon 5, evening 8. The panel returns #1 Evening (5pm to 10pm) 8/10, then #2 Morning (6am to 12pm) 7/10, then #3 Afternoon (12pm to 5pm) 5/10. With the schedule box holding “Mon/Wed 9-11, Tue/Thu 1-3”, the tip underneath echoes those same class times and tells you the best slot is the highest energy window that does not overlap them.
Now score yourself as a morning person: morning 9, afternoon 4, evening 3. The list flips to Morning, Afternoon, Evening, and the gap between first and last is six points instead of three. Two hours of work at 9am is not the same as two hours at 9pm, and you already knew that.
Try a tie. Set morning 6, afternoon 6, evening 4, and the first two come back in their built-in order, morning then afternoon, because equal scores are not shuffled about randomly. That is a tidy default rather than a judgement about your life.
The useful move afterwards is to pick one window and defend it. If morning comes back at 9/10 and afternoon lands last at 4/10, book the hard subject into the morning and leave the afternoon for laundry and lectures. A spread that wide is the difference between starting a problem set and opening it, reading one line, and putting the kettle on instead.
What this tool does not do
- The preferred study days dropdown is never read by the calculator. Tick Saturday and nothing in the output changes. It is there so you commit to a day on screen, while the ranking itself comes only from your three energy numbers.
- Three windows and no others. There is no block for 10pm to 6am, so anybody who genuinely works better after midnight gets filed under evening with everybody else.
- It cannot see your timetable. Whatever you type in the schedule box gets echoed straight back rather than checked, so a typo in those hours goes into the tip without complaint.
- Energy scores are guesses you made about yourself, and a guess on Monday is not the same guess on Thursday. Re-score every few weeks instead of treating the numbers as fixed.
- Nothing is stored. Close the tab and the scores are gone with it.
Other tools
- Habit Streak Counter – count the days you actually kept the study habit going
- Home Study Clock – a clock for the hours you set aside at home
- Procrastination Tracker – where the hours you meant to study actually went
Frequently asked questions
What do the stars mean?
Ten stars per window, with the filled ones matching the score you gave it out of 10. The number is printed beside them as well, so you never have to sit there counting.
Why does my preferred study days selection do nothing?
Because the ranking only ever looks at the three energy numbers. The days dropdown is a prompt for you to make a decision, not an input to the maths. If you want the days to matter, use the tip line: type your class hours in the schedule box and read what comes back.
What happens if two windows score the same?
They keep the order they were built in: morning first, then afternoon, then evening. Equal scores are not broken with a coin flip, so a tie always reads the same way.
Can I add my own time block?
No. The three windows are fixed at 6am to 12pm, 12pm to 5pm and 5pm to 10pm, with no way to change the edges. If your real study window sits outside those, score the nearest one and adjust the plan yourself.
Does it save my scores or my schedule?
Nothing is saved and nothing is sent anywhere. It runs in your browser for the length of one visit, so write down the ranking if you want to compare it against next month’s.