Squid: Take Notes, Markup PDFs
Squid: Take Notes, Markup PDFs Summary
Squid: Take Notes, Markup PDFs is a with in-app purchases Android app in Productivity by Steadfast Innovation, LLC. Released in Mar 2012 (13 years ago). It has about 11.2M+ installs and 69.8K ratings with a 4.22★ (good) average. Based on AppGoblin estimates, it reaches roughly 159.6K monthly active users and generates around $10K+ monthly revenue (100% IAP / 0% ads). Store metadata: updated Feb 1, 2026, version 4004002.
Recent activity: 30.6K installs this week (109.9K over 4 weeks) showing below average growth , and 20 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Feb 25, 2026. The app's network data flows (API traffic to/from the app and its SDKs) were last crawled on Jun 11, 2025.
Store info: Last updated on Google Play on Feb 1, 2026 (version 4004002).
Squid: Take Notes, Markup PDFs was last scanned for SDKs 2026-02-25. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
Square
Kotlin
Google
Firebase
Keepsafe4.22★
Ratings: 69.8K
Screenshots
App Description
Take handwritten notes for class, work, or fun! Easily markup PDFs and share…
Transform your note-taking experience with Squid! For over 12 years, Squid has been a trusted app with over 12 million installs, helping users replace paper, save money, and reduce waste. Write just like you would on paper on your Android tablet, phone, or Chromebook!
✨ Key Features:
• ✍️ Natural Writing: Seamlessly write with a pen and erase with your finger on active pen enabled devices like Samsung devices with S Pen. Use your finger or capacitive stylus on other devices.
• ⚡ Low Latency Ink: Enjoy a seamless and responsive writing experience with support for low latency ink¹.
• 🔒 Private: Notes are stored on your device and are completely private. No account or sign-in required. Backup your notes to your desired location.
• 📝 PDF Markup: Easily annotate PDFs, fill out forms, edit/grade papers, and sign documents.
• 🧰 Versatile Tools: Use any color pen or highlighter, import images, draw shapes, and add typed text.
• 📁 Organize: Select, copy/paste, and move content between pages and notes. Place notes in folders to stay organized.
• 📊 Presentations: Turn your device into a virtual whiteboard and cast your notes to a TV/projector.
• 📤 Export: Export notes as PDFs, images, or Squid Note format and share or store in the cloud.
• 💰 Save: Reduce stationery costs and replace paper notebooks with Squid for eco-friendly note-taking!
🏆 Awards/Recognition:
• 🌟 Featured App and Editors' Choice in Google Play
• 📈 Category Honorable Mention for Productivity in the Samsung Galaxy Note S Pen App Challenge
• 🎉 Popular Choice Award in the Dual Screen App Challenge
👑 Squid Premium:
• Premium paper backgrounds: math, engineering, music, sports, planning, & more
• Import and markup PDFs
• Additional tools: highlighter, true eraser, shapes, text
• Backup/restore and bulk export notes as PDFs to Google Drive, Dropbox, or Box
🛠️ Base Features:
• Vector graphics engine keeps your notes beautiful at any zoom level and on any device
• Various paper backgrounds (blank, ruled, graph) and sizes (infinite, letter, A4)
• Erase entire letters or words quickly with the