Tools
Free tools for money, AI, and learning.
Free calculators, quizzes, and interactive tools for money, AI, and learning, from the Scroll family of apps. No sign-up, no ads.
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Made by Scroll, for the whole family of apps.
Which Scroll app is for you?NewAnswer a few questions and get the right app for your goal.Doom-spending calculatorWhat impulse spending costs, and what it could become invested.What your scroll time is worthTurn daily scrolling into what you could learn instead.Money bias quizFind the cognitive biases quietly costing you money.
Money
Free calculators from Scroll: Personal Finance.
Compound interest calculatorSee how savings and investments grow over time.FIRE number calculatorHow much you need invested to retire early.Mortgage affordabilityEstimate the home price you can afford.Take-home pay calculatorFrom gross salary to what actually lands in your account.Emergency fund calculatorHow big your safety net should be.Savings goal calculatorThe monthly saving to hit a target by a date.Debt payoff calculatorYour debt-free date and the interest it will cost.Investment fees calculatorThe long-term drag of fund fees.Rent vs buy calculatorCompare renting and buying over your timeline.
AI
Tools from Scroll: Learn AI.
Token counterSee how your text breaks into tokens, live.LLM cost calculatorPrice a prompt across GPT, Claude, and Gemini.Prompt libraryReusable prompt templates to copy.Context window calculatorWhat fits inside a model’s memory.AI glossaryPlain explanations for 100+ AI terms.AI literacy quizTest your AI knowledge in ten questions.AI model comparisonGPT vs Claude vs Gemini, side by side.Which AI model?Find the right model for your task.Spot the AICan you tell human writing from AI?Spot AI imagesA checklist for spotting fake photos.
Learning & focus
Tools from Scroll: Daily Microlearning.
Forgetting curve simulatorWatch memory fade without review.Spaced repetition schedulerWhen to review so things stick.Reading speed testMeasure your reading speed.Reading time calculatorHow long an article takes to read.Pomodoro timerFocused sessions with timed breaks.Habit formation calculatorHow long a new habit really takes.Daily learning calculatorWhat five minutes a day adds up to.Study plannerBuild a realistic study schedule.Memory span testTest your working memory.Screen time calculatorWhat your screen time adds up to.