Learning science you can play with.
Small, free tools that make the research tangible. No sign-up, no catch. More on the way.
Forgetting Curve Simulator
Watch memory fade, then add spaced reviews and see the curve flatten. An interactive take on the Ebbinghaus forgetting curve.
Open toolStudy toolsSpaced Repetition Scheduler
Enter what you learned today and get the exact dates to review it, using expanding intervals proven to beat cramming.
Open toolReadingReading Speed Test
Read a short passage against the clock and find out your words per minute, then see how you compare to the average reader.
Open toolReadingReading Time Calculator
Paste text or enter a word count to get instant reading time at slow, average, and fast speeds, plus word and character counts.
Open toolFocusPomodoro Focus Timer
A clean, free Pomodoro timer. Set your focus and break lengths, then work in intervals and watch your completed sessions add up.
Open toolHabitsHabit Formation Calculator
Pick a start date and see your real path to a habit, with the milestone days that the research actually supports.
Open toolHabitsDaily Learning Calculator
Five minutes a day sounds like nothing. See how many hours, lessons, and books it compounds into over a year and beyond.
Open toolStudy toolsStudy Session Planner
Give it your deadline and how much you have to cover, and it builds a spaced revision plan that beats a last-minute cram.
Open toolLearning scienceMemory Span Test
How many digits can you hold in mind at once? Take the test and see how your working memory compares to the typical span.
Open toolDigital habitsScreen Time Reclaim Calculator
Enter your daily scroll time and see the yearly cost in whole days, plus what you could learn or read with those hours instead.
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