All-in-One Study Tool

Welcome to the power of digital note taking with Flexcil.
The note taking app & PDF reader for the smart and swift people!

Download It for Free 🙂

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Flexcil for Education

Flexcil for teachers and students!

Schools and Educational institutions can use it for free 🙂

Advanced PDF Markup and Note Taking Experience

“Our way of studying had not been revolutionized as much as technological advancement, until Flexcil was born.
–  Apple  –


All-in-One Study Tool

Review and utilize PDFs to study effectively. Use PDF reader, digital note, annotation, and reference manager in one page.

Natural & Simple UX

Use simple Gestures UX to annotate PDF and organize notes efficiently without interruption.

Time is Gold

Save time to read, organize, and edit materials. Use the time saved to concentrate on your study.

Selected by Apple

iPad Demo App in Apple Stores Worldwide

Featured App by Apple App Store in 156 Countries

#1 Free App on Apple App Store (Productivity)

Selected by Google

Play Together app on Google Play

#1 Free App on Google Play (Productivity)

Accelerated by Samsung

Selected as Samsung C-Lab Outside

Samsung’s startup accelerating program

Do Everything in 2-step

Let PDF be your note taking playground!

Flexcil’s built-in pen gesture makes PDF markup and note taking easier than ever.

Markup PDF &
Take Note at a Glance!

If switching between PDF and taking notes from multiple sources is tiring you out, it’s time to do it the Flexcil way.


Link Everything Seamlessly

No more scattered information!

Information scattered across multiple documents can be linked and integrated with each other through Flexcil’s reference links.

PDF Editing & Full Compatibility

Handwriting and markup on PDF is basic.

Merge PDFs and freely edit PDF pages as well as outlines and bookmarks. Compatibility is a bonus.

Read, Annotate, and Take Notes on PDF without Hassle

Audio Record & Note Replay

Audio record and handwriting sync allows you to track what you hear when take note.

Multi-page View

Select between single page, 2-page, or 4-page view for a more pleasant reading experience.

Cloud Connection

Connect with various cloud storages, including Box, Google Drive, iCloud, Dropbox, OneDrive, and etc.

Vector Ink & Highlighter

Vector ink that displays clearly even when enlarged, and highlighter that does not blur the text.

Powerful Note Taking Toolkit

Squared/round highlighter, dotted pen, straight line pen, fountain pen, shape tool, and etc. we got all you need for effective note taking.

Cloud Sync

The handwritten notes are automatically synchronized, allowing you to write on your tablet and review on your smartphone

Masking Pen

Memorize while hiding the content of the document. Measure correct/incorrect answers to easily identify your weak areas at a glance

Sticky Note

Need separate notes aside from document annotations? Use the sticky note feature to jot down quick memos on your documents

Sticker Feature and Diverse Digital Content

Save images as stickers to use anytime easily. Enjoy digital planners and templates that are regularly updated

Free Download on the Apple App Store, Google Play and Huawei App Gallery!

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What People are Saying

Great note-taking app!
Exactly what I am looking for

This is the app I’ve been waiting for so long. My favorite feature of this app is that it allows me to hand write notes on a separate notebook while reading and annotating a PDF document.
Flexcil does all I need. Many thanks to the developers!

John Smith

via the Apple App Store

Easy to use and helpful.

This app just easy and simple to use and it saves a lot of time where I just need to carry my iPad without heavy textbooks for my works.

Guiz Cheng

via the Apple App Store

Great app for researchers!

This is a purposely designed app for digital note taking and documents highlighting/underlying. The ultimate purpose for these activities is to assist learning, memory and information retrieval. Flexcil allows one to perform these activities with minimal effort using gestures and these gestures are easy to learn and intuitive.

iGo Jian

via the Apple App Store

Great app for reading + annotating + taking notes at the same time.

The app is great for reading + annotating + taking notes at the same time. I really like that I can freely move the notes anywhere on top of the PDF, annotate with gesture, move annotations around, share notes across different PDF files, look up words in the dictionary, keyword search in PDF, etc. I highly recommend the app!

Z Cui

via the Apple App Store

Our vision

Flexcil originally started because our team thought carrying books around was a hassle. Textbooks are big and heavy, and you have to switch them for each class. Losing a book or a notebook means losing all the data that you’ve organized on them.

The purpose and dream of Flexcil is to lighten the bags of students around the world by replacing thick and heavy paper texts with light, digital text-books. Technology has been improved extremely, but the way of studying has not caught up. With Flexcil, studying becomes enjoyable and easier.

We want to innovate the studying environment and experience by providing the best digital study tool.


Productivity Comes with Flexcil.