Comparison

Flexcil Note & Good PDF Reader vs Study Stack

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Flexcil Note & Good PDF Reader

This app is a comprehensive note-taking and PDF reader designed for Apple devices. It allows users to edit PDFs, annotate documents, create bullet journals, and record audio, all while offering intuitive gesture controls and seamless integration with cloud services.

Highlights
  • Edit PDF pages
  • Annotate documents with gestures
  • Record and playback audio
  • Create bullet journals
  • Cloud sync across devices
  • Masking pen for precise annotations
Features
Read full description

Flexcil: The world’s ultimate iOS note-taking app Loved by Apple Editors - Editor's Choice, App of the Day, Note-taking on the next level, College Life, Apple Pencil Enhanced, New Apps We Love, Noteworthy Apps & Game, Productivity Boost for teachers Whether you’re taking notes, bullet journaling, reading documents, or editing pages from textbooks ー use Flexcil! It’s the #1 note-taking tool for any Apple device. Simply highlight by pen gestures and capture images and text on the study-note by pen gestures! Save time transcribing summaries by gestures on study-note with your Apple pencil. ALL IN ONE NOTE TAKING • Edit PDF pages • Annotate almost anything • Endless pen colors, sizes, and fonts • Seamlessly highlight and underline text with GESTURE • Summarize and organize your thoughts, texts and notes • Instantly open any PDF for reading and studying • Zoom to read small text • Organize and manage your books AND notes EASY AND INTUITIVE • Drag and paste text flawlessly • Add text and annotate with ease • Smooth Image selection • Reading and pen gesture mode - FLEXCIL EXCLUSIVE • Search the dictionary for any definitions you need • Improved the tiring, old-fashioned way of writing which results in wrist/palm pain BULLET JOURNAL & TAKE BETTER NOTES • Easily create bullet journal pages • Hundreds of colors and pen stroke sizes • Colorful covers & templates • Endless creativity ー perfect for artists, hobbyists, or anyone that wants to make studying more fun • Proven to boost productivity & happiness RECORD & PLAYBACK AUDIO • Record everything you hear whenever you take class notes or writing meeting notes • Replay audio recording and review what you wrote during the class or in the meeting • Tab on your note and hear what was said at the moment MULTITASK • Use Flexcil while other apps are open - take notes during lectures! • Edit 2 PDFs at once • Advanced viewing: full screen view, vertical scroll, 4-page view, and so much more COMPATIBLE WITH: • Zoom • Google Classroom • Google Drive • Dropbox • Box • iCloud • Notes • Digital textbooks • ebooks • PDFs and more! APPLE PENCIL • Simulate real-life note-taking by using your Apple Pencil - easy to use for all ages • Guaranteed ZERO touch malfunctions • Support Apple pencil 2nd generation & double tap Plus, enjoy these NEW FEATURES! • Cloud sync: Access your notes from anywhere, and seamlessly sync across devices. • Masking pen: Enhance your annotations with precision using the masking pen. Take your note-taking to the next level with Flexcil. Download the most comprehensive, easy to use, and innovative study tool on the App Store today! * Support: https://support.flexcil.com * Website: https://www.flexcil.com * Twitter: https://www.twitter.com/flexcil * Facebook: https://www.facebook.com/flexcil * Youtube: https://www.youtube.com/channel/UCjro4WpiFnxqKxAXQmASNwg [Access Permission Guide] • Storage (Photos and Videos): Used for adding images to documents in Flexcil, accessing PDF files, purchasing and downloading store content. • Music and Audio: Used for voice recording features, purchasing and downloading store content. • Microphone: Used for voice recording. • Camera: Used for taking pictures when adding photos. • Notifications: Used to display important notification content.

About

Study Stack

Manage all your academic tasks, assignments, and exams in one organized place. Track daily courses, upcoming deadlines, and overdue work with clear visual indicators. Features a clean interface with light and dark mode support.

Highlights
  • Add courses with details
  • Track assignments and exams
  • View daily courses and upcoming deadlines
  • Mark assignments as complete
  • Sort lists by importance
  • Light and dark mode support
Read full description

Study Stack is a clean and intuitive course manager/ assignment notebook. It allows students to keep track of all assignments, exams, and course schedules in one place. Students can view the day's courses or check off upcoming assignments with ease. Features: • Add courses(includes name, icon, start time, end time, and days of the week) • Add assignments to courses(includes name and due date) • Add exams to courses(includes name and exam date) • Delete courses, assignments, exams, or clear everything to start a new term • View "Today's Courses" to see the days courses in sorted order • Indicators to show if a class is awaiting start, in progress, or concluded • View assignments that are due soon, check off assignments as needed • Overdue assignments show in red • All lists are sorted by importance of course or assignment • View upcoming exams • View all courses or view one course in detailed view • Various filtering options • Clean and responsive UI • Dynamic home screen header, changes based on time of day • Supports light and dark mode • In app banner system

Screenshots

Flexcil Note & Good PDF Reader4 screens
Study Stack4 screens

Verdict

The call

The clearest difference is rating: Study Stack at 5.0 against Flexcil Note & Good PDF Reader's 4.4. Study Stack also leads on review sentiment (100% vs 59%) and in-app purchases (none vs 13). Flexcil Note & Good PDF Reader's advantage is ratings volume (403 vs 2) and update cadence (weekly vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flexcil Note & Good PDF Reader sells 13 one-off in-app purchases. Study Stack asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Study Stack holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Flexcil Note & Good PDF Reader has 403 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 59% of Flexcil Note & Good PDF Reader's written reviews are positive against 100% of Study Stack's.

UpkeepUpdate frequency

Flexcil Note & Good PDF Reader ships an update weekly, Study Stack fortnightly. The most recent releases landed on September 27, 2026 and June 4, 2026 respectively.

Scorecard7 real differences · 3 level
Flexcil Note & Good PDF Reader versus Study Stack: the parameters behind the verdict, then further details
ParameterFlexcil Note & Good PDF ReaderStudy Stack
PriceFreeFree
Rating4.4 (403 ratings)5.0 (2 ratings) — better
Positive reviews59.2% of reviews100.0% of reviews — better
Number of ratings403 — better2
Update frequencyWeekly — betterFortnightly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.014.0
Further details — not scored
Size227 MB1 MB
Age rating4+4+
DeveloperFlexcil Inc.Erik Mederos

Customer experience

Flexcil Note & Good PDF Reader

All ratings403 ratings
Positive86.1%
Neutral4.2%
Negative9.7%
Written reviews768 reviews
Positive59.2%
Neutral11.8%
Negative28.9%

Study Stack

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Flexcil Note & Good PDF Reader

Reported bugs

5 issues
  • Sudden data loss and file deletion
  • Inability to restore purchases
  • Frequent app crashes and freezes
  • Inconsistent behavior of undo/redo functions
  • Annotations not exporting correctly

Requested features

6 requests
  • Add iCloud sync and backup
  • Improve handwriting search and recognition
  • Bring back reading mode and one-page scrolling
  • Add more pen and brush options
  • Allow customizing notebook paper styles
Show 1 more
  • Implement auto-save and version control

Study Stack

Not enough reviews yet to summarise bugs or requests.

In-app purchases

13 purchases

Flexcil Note & Good PDF Reader

One-time13
  • Upgrade product for old usersFree
  • Premium$8.99
  • Flexcil Standard$9.99
Show 10 more
  • 2021-2022 Color Planner$11.99
  • Flexcil NEW Design Planner 22$11.99
  • Premium & Toolbar Skin Pack$12.99
  • Hello Kitty Planner 2022$13.99
  • My Melody & Kuromi Planner 22$13.99
  • Standard & 21-22 Planner Pack$14.99
  • Standard & Design Planner Pack$14.99
  • Standard & 2023 Planner Pack$14.99
  • 2026 Ultimate Planner(Dated) : Pro$15.49
  • Nelna 6-in-1 Planner Bundle$19.99
None

Study Stack

No in-app purchases

Questions

Is Flexcil Note & Good PDF Reader free?
Flexcil Note & Good PDF Reader is free to download, with in-app purchases available.
Is Study Stack free?
Study Stack is free to download, with no in-app purchases.
Which has better reviews, Flexcil Note & Good PDF Reader or Study Stack?
Study Stack is rated higher. Flexcil Note & Good PDF Reader averages 4.4 out of 5 from 403 ratings, while Study Stack averages 5.0 from 2 ratings.
Do Flexcil Note & Good PDF Reader or Study Stack have ads?
Flexcil Note & Good PDF Reader shows ads; Study Stack does not.
Which is updated more often, Flexcil Note & Good PDF Reader or Study Stack?
Flexcil Note & Good PDF Reader ships an update weekly, and Study Stack fortnightly. Most recently, Flexcil Note & Good PDF Reader was updated on September 27, 2026 and Study Stack on June 4, 2026.

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