Squid: Take Notes & Markup PDFs on Android

Overview

Squid is a trusted note-taking and PDF markup solution built for the way you work on mobile and desktop devices. For more than a decade, millions have relied on Squid to replace paper, cut costs, and reduce waste while preserving the tactile feel of writing on real paper — now on your Android tablet, phone, or Chromebook.

Core Features

Natural handwriting on screen

Write just as you would on paper, with responsive input that feels intuitive on touch and stylus.

PDF markup and annotation

Highlight, draw, and annotate directly on PDF documents for review, feedback, or study materials.

Multi-device versatility

Access and create notes across Android devices including tablets, phones, and Chromebooks without friction.

Paperless savings and sustainability

By replacing disposable paper, Squid helps you save money and reduce waste over time.

User-centric design

A clean, professional interface designed for productivity, whether you are a student, professional, or casual user.

• Improved comprehension with handwritten notes that mimic the physical note-taking process
• Efficient PDF review by marking PDFs directly within the app
• Organized digital notebooks that travel with you across devices
• Clutter reduction and cost savings through paperless workflows

Why Download Squid

With over 12 years in the market and more than 12 million installs, Squid has a proven track record of reliability and ongoing updates. It is a trusted choice for students, professionals, and teams who demand accuracy, speed, and a seamless user experience on Android devices.

Getting Started

1. Install Squid from the Google Play Store
2. Create your first note and choose the handwriting input
3. Open a PDF and start annotating with highlighting, underlining, or drawings
4. Save, organize, and reuse notes across your projects

Privacy and Security

Squid is designed to be a dependable, privacy-conscious solution for personal and professional use. Your notes and documents stay in-app and on-device as you work, with standard protections expected from a mature productivity app.

Compatibility

Optimized for Android tablets, phones, and Chromebooks, Squid gives you a consistent note-taking and annotation experience across form factors and screen sizes.