Bússola Draw: Draw on Screen

Reading closely means marking things up: you underline the "except", circle the detail that changes everything, cross out the option you've already ruled out. On paper you do it without thinking. On screen, A Bússola Draw lets you do the same: draw on screen, right on top of what you are reading.

HOW IT WORKS

A Bússola Draw is a browser with the drawing tools already open on top of the page. Type any address, or save your favorite sites as shortcuts on the home screen, and write on the page like you would on paper. Your marks stick to the text: scroll the page and they scroll with it.

SCREEN PEN

The pen also works outside the browser, so you can draw on screen over any app. Tap "Screen Pen" on the home screen and a floating toolbar stays on top of everything: a PDF reader, a video class, another browser. Drag the bar by its dots or fold it into a bubble; tap "Use the app" to scroll without drawing; take a screenshot with your marks straight to the gallery. The first time, Android asks you to allow the app to appear on top of other apps.

THE TOOLS

✏️ Pencil: freehand, to underline and jot notes the way your hand wants
🖍️ Highlighter: see-through marker, ruler-straight or freehand
╱ ▢ ◯ Line, rectangle and circle: to split passages and box in what matters
🔴 Laser pointer: a trail that fades away a couple of seconds later, to point and explain
🧽 Eraser: removes a whole stroke with one tap, or just where you rub
↩️ Undo, redo and clear all
📷 Screenshot: the whole page or just an area, with your drawings, saved to the gallery (an area is also copied to the clipboard)
🧮 Calculator: opens on top of the page, no app switching (tablets)

COLOR AND THICKNESS FOR EACH TOOL

Tap the selected tool again to pick its color and stroke thickness. Each tool remembers its own: the highlighter stays yellow, the pencil stays red.

MADE FOR A STYLUS

Rest your hand on the screen while you write: the app recognizes the stylus and ignores your palm. One finger draws and two fingers scroll the page.

MAKE IT YOURS

Put the toolbar at the top, at the bottom or on either side. There's full screen and dark mode (Light, Dark or Auto). Available in English and Portuguese.

ON A PHONE

On a phone the toolbar stays compact: pencil, highlighter, laser pointer and eraser sit on the bar, and shapes, undo and redo, clear all and screenshots are one tap away in the ⋮ menu. Screen Pen works on phones and tablets.

FOR TEC CONCURSOS USERS

The app was born on TEC Concursos, a Brazilian question bank. There it can add an answer shortcut bar that picks options A to E, marks right or wrong and jumps to the next unsolved question, by pressing the keys the site already understands. In English it starts hidden; turn it on in ⚙️ Settings.

FREE AND PREMIUM

Free: pencil and eraser, on the page and in Screen Pen, plus two-finger scrolling, palm rejection, full screen and dark mode.
Premium: highlighter, line, rectangle and circle, laser pointer, every color, the answer shortcut bar, screenshots and the calculator; in Screen Pen, also the highlighter, shapes, laser pointer, colors, thickness and screenshots. Monthly, Yearly or Lifetime plans, paid through Google Play. Subscriptions can be canceled anytime.

PRIVACY

No sign-up, no login, no ads and no tracking. Your preferences stay on your device. Payment goes through Google Play; the app never sees your card details.

ALSO ON DESKTOP

On Chrome and Firefox, A Bússola Draw is a free extension with every tool unlocked.

Made by people who study for exams, for people who study for exams. Ideas, problems or suggestions: @abussoladraw on Instagram.

A Bússola Draw is an independent project, not affiliated with, sponsored or endorsed by TEC Concursos, Qconcursos or any other question-bank site. The names mentioned belong to their owners and appear here only to say where the tool is often used.