Features

Practice modes

Pick one from the toolbar above the typing surface, or land directly via deep-link from anywhere on the site. On mobile, tap the "current mode" summary chip to open the full picker as a bottom sheet.

• Time — type for 15, 30, 60, 120, or 300 seconds. The most common test format.
• Words — type a fixed count of 10, 25, 50, or 100 words.
• Quote — type a curated literary quote in short, medium, long, or "epic" length buckets.
• Tape — single horizontal line of words that scrolls left as the caret advances. 15-second sprint by default; reads like a ticker.
• Idiom — random English idiom with attribution.
• Poem — random public-domain poem.
• Zen — untimed, endless. Stop when you stop. Good for warm-ups.
• Adaptive — generates words biased toward the keys and bigrams you struggle with most.
• Custom — type your own text. Drop a .txt, paste a chapter, or save a URL.

Games

Mini-games built on your missed-words list — sustained engagement when deliberate practice feels like a chore. Per-mode high scores saved locally.

• Catch the Word — words fall from the top, type each one before it hits the bottom. Three misses ends the round.
• Word Shooter — words drift across the screen horizontally; type each to shoot it down before it leaves the frame. Plane-crash explosion on catch.
• Endless — no 3-miss cap, spawn rate ramps faster. Personal high score tracked.

Visible combo multiplier (1.5x at 5 caught, 2x at 10, 3x at 20, 5x at 40) and score-pulse animation on every catch. "New best!" overlay at round end when you beat your record.

Lessons

Twenty-four progressive lessons taking you from the home-row anchors through the full keyboard, common bigrams, and finally adaptive review. Each lesson restricts the typing surface to a focused key cluster and generates synthetic drills or filtered words from those keys only. Clear 90% accuracy at 18 wpm to unlock the next.

Drills

Quick finger-row practice — home row, top row, bottom row, vowels, left hand, right hand. Targeted muscle-memory exercises in 30 seconds.

Eleven challenges

• Sprint — 60 s at 60 wpm, 95% accuracy.
• Marathon — 5 min at 50 wpm, 96%.
• 100 Words / 500 Words — endurance tests.
• Quote Chase — type a literary quote at speed.
• Mountain Climb — words get progressively harder as you climb.
• Pangram Run — every letter, every time.
• Numbers Gauntlet — numbers only.
• Punctuation Gauntlet — apostrophes, hyphens, periods.
• Code Mode — function, const, return.
• Zen — no goal, no end, no judgment.

Bests are tracked per profile.

Adaptive engine

A rolling per-character and per-bigram model. Every keystroke records:

• error rate (Laplace-smoothed for low-sample keys)
• average key-down time normalized against your overall average
• bigram timing for transition pairs (th, er, qu)

The word picker uses a weighted roulette-wheel sampler against a 1k/5k/10k common-word list, biasing toward words that contain your weakest keys and bigrams.

Cold start (no data yet)? Falls back to uniform sampling.

Custom text

Drop a .txt or .md file, paste any text into the textarea, or fetch a URL. Sanitized (HTML and scripts stripped, entities decoded), normalized (line endings, blank-line runs collapsed), and chunked into ~500-character segments at sentence boundaries. Cap of 200 KB per profile.

Stats dashboard

D3-driven visualizations, lazy-loaded; hand-rolled SVG fallback if D3 fails to fetch.

• Lifetime totals — sessions, characters typed, total practice time, best wpm, best accuracy, daily streak.
• WPM trend — last 30 sessions as a line + area chart with rolling-mean overlay.
• Daily activity — Year / Month / Week toggle. Click any day cell to drill into that day's session list with hourly breakdown.
• Keyboard heatmap — per-key error rate or speed, toggleable.
• Per-finger errors — error rate × avg key time for all 10 fingers.
• Per-key bars — slowest keys, sortable.
• Character report — sortable per-character table: samples, errors, error %, avg ms, last seen.
• Lesson trends — WPM line per lesson across attempts.
• Missed words — top 20 words you struggle with most. "Practice these" CTA routes to the adaptive picker over missed-only.
• Recent sessions — last 30 with mode, wpm, accuracy, sparklines.
• Achievements grid — ~120 unlocks across speed, accuracy, streaks, volume, endurance, variety, mastery, time-of-day, easter eggs.
• Mode bests — personal best wpm/accuracy per mode + duration.

Profiles

Multi-profile per device. Each profile has its own settings, stats, model, and custom texts. Switch via the settings page; export the full dataset to JSON; import on another device.

Themes & layouts

Light + dark + system preference, with a no-flash inline script in <head>. Four keyboard layouts for the heatmap visualization (QWERTY, Dvorak, Colemak, Workman) — input handling always uses KeyboardEvent.key, so OS-level layout choice is what governs actual typing.

Privacy by default

No accounts. No backend. No cookies. Everything lives in your browser's localStorage on this device. The site runs Umami for cookieless aggregate analytics — the full dashboard is public at /analytics/. What's typed never leaves your browser.

Mobile

• World-class toolbar: stats row + "current mode" summary chip that opens a bottom-sheet picker covering every mode, variant, and source.
• OS soft keyboard typing on practice + games (inputmode="text", never inputmode="none").
• Pause guard at the engine level — soft-keyboard taps can never pause mid-typing.
• 44 × 44 px touch targets across every interactive element.
• Service-worker auto-update: new builds reach phones without manual cache clears.

Keyboard shortcuts

Library + per-paragraph book progress

The /library/ corpus ships full Project Gutenberg books split into ~500-character paragraphs. Per-paragraph progress is tracked locally — open a book days later and "Continue typing" picks up where you left off. Reset button per book wipes that book's progress without touching the rest of your data.

Completion tracking

Every quote, idiom, parable, poem, and book paragraph you type all the way through (at 80%+ accuracy) gets a green ✓ on the corpus list pages. Per-row "Reset" undoes individual completion; "Reset all (N)" clears every completion for that kind. Esc-bailing partway through never marks an item complete.

Contribute hub

Eight Web3Forms-backed forms at /contribute/ let users suggest content (quotes, books, parables, idioms, poems, drills) or send feedback (testimonials, thanks notes). No signup, draft autosave, URL-param prefill from corpus pages. Approved testimonials appear on /reviews/, approved thanks notes on /thanks-wall/.

Blog + RSS

Notes on building GuerillaType at /blog/ — feature announcements, design decisions, the occasional rabbit hole. Atom RSS feed at /feed.xml. Each post has a sticky TOC, reading-progress bar, social-share row, prev/next nav, and a drop cap on the first paragraph.

Fullscreen

A fullscreen toggle button sits next to Settings in the site header. Uses the standard browser Fullscreen API; F11 works too.

Accessibility

• WCAG 2.2 AA: 4.5:1 contrast for normal text, 3:1 for large.
• 44×44 px touch targets across the entire UI.
• Visible focus rings on every interactive element.
• Skip link to main content.
• aria-current="page" on active nav. aria-live regions for live stats.
• prefers-reduced-motion respected globally.
• Tested with WAVE.