Education and study tools

Study aids and calculators that can reopen offline after an online visit, and never ask who you are.

4 tools ready to use

Typing PracticeA typing speed test that says where the speed went: a heatmap of your keys, a breakdown by finger, and a replay of the run. No account.Open toolFree · in-browser Flashcard MakerPaste a list to build a deck, study it with spaced repetition, and print it double-sided. Signed-out decks stay in your browser. Typed decks save privately when signed in. Imported decks stay local.Open toolFree · in-browser Unit ConverterConvert 436 units across 60 categories by typing a command or browsing the catalogue. Shows the factor, formula and every equivalent value.Open toolFree · in-browser Pomodoro TimerFocus and break intervals that stay accurate in a background tab, with the finish time on screen. No account, no ads.Open toolFree · in-browser

Every tool on this shelf works without signing in. Study work stays on this device while signed out. Sign in to save typed or pasted decks, timer tasks and settings privately across devices. Decks containing imported files stay in browser storage.

It is also the shelf where working offline matters most. A previously visited study tool can reopen and keep running on a train, in a library basement and on a phone with no signal, which is more than can be said for most of what you would revise with otherwise.

2 more in build

Named and designed, but not written yet. They are listed so you can see where this shelf is going. No dates, because a promised date on a free project is a broken one waiting to happen.

Scientific CalculatorFull keyboard entry, a visible tape of what you typed, and no ads between you and the answer.In build

Percentage CalculatorPercentage of, increase, decrease and change, each with the working shown.In build

Guides for these tools

How to convert units: factors and roundingA reliable factor method for length, area, volume and temperature, with worked examples and the rounding mistakes that change an answer.Average typing speed, and what counts as goodThe real averages by age, by job and by hand position, why two tests give you two different numbers for the same typing, and which number an employer means.How to make flashcards that actually workPaper, Word, Google Docs, Quizlet, Anki and the browser compared, plus the four rules for writing a card you will still get right in a month.How long should a pomodoro be?What Cirillo actually specified, why 25 and 5 stuck, and where 50/10, 52/17 and the shorter ADHD intervals fit. Plus what eight timers default to, counted.

This is one shelf of the full floi directory. The rest is media, text, developer, documents, education and design.