12 free tools · no sign-up
Free tools for reading, memory and focus
Tests and calculators built on published research, with the study behind each one named on its page. They run in your browser, and nothing you type is sent anywhere.
Reading
How fast you read, and how long a text will take.
Memory
How much you can hold in mind, how fast it fades and when to review.
Quizzes
Questions from Scroll's lessons, with every answer explained.
Focus and habits
Attention, screen time, timers and how long a habit takes.
- Attention span testA four-minute focus check: press for every number except 3, and see where you slip.
- Habit formation calculatorWhen a new daily habit is likely to feel automatic, based on the research.
- Screen time calculatorWhat your daily phone time adds up to over a year, and over a lifetime.
- Pomodoro timerA focus timer with 25-minute work blocks and short breaks.
Every day
Fact of the day
One lesson from the app each day, with its source and a question to check it.
Your next scroll could teach you something.
Install Scroll free on iPhone or Android. 5 lessons a day cost nothing, and each takes about a minute.
On a computer?Point your phone's camera here to open the right store.
