Squid: Take Notes, Markup PDFs
Squid: Take Notes, Markup PDFs Summary
Squid: Take Notes, Markup PDFs is a free, with in-app purchases Android app in Productivity by Steadfast Innovation, LLC. Released in Mar 2012 (14 years ago). It has about 12.4M+ installs and 70K ratings with a 4.22★ (good) average. Based on AppGoblin estimates, it reaches roughly 236K monthly active users and generates around $10K+ monthly revenue (100% IAP / 0% ads). Store last updated Feb 1, 2026
Recent activity: 36K installs this week (187K over 4 weeks) showing strong growth , and 15 new ratings this week View trends →
SDK intelligence: AppGoblin detected 3 development tools(e.g. Square), 1 analytics: product,and 1 business tools integrated into Squid: Take Notes, Markup PDFs. View full SDK list →
Data tracking: The app's network data flows (API traffic to/from the app and its SDKs) were last crawled on Oct 11, 2025.
Squid: Take Notes, Markup PDFs SDKs Summary
Squid: Take Notes, Markup PDFs was last scanned for SDKs on 2026-08-11. Below is the overview of third-party companies detected in the app. The full list of SDKs, permissions and unknowns is available here.
Square
Kotlin
Google
Firebase
Keepsafe4.22★
Ratings: 70K
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