Comparison

pdf vs KERoster

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

Head to head
About

pdf

Manage and annotate PDF files on your iPad with fast page turning and intuitive finger-writing. Easily import, organize, and share your notes with friends. Offers a seamless reading and editing experience.

Highlights
  • Fast page turning and content scanning
  • Intuitive finger-writing with zoom-in
  • Easy PDF import via Dropbox, Email, or iTunes
  • Organized bookshelves with search
  • Variety of pens, highlighters, and text notes
  • Export annotated PDFs via email
Features
Read full description

Utilize pdf-notes to manage all the pdf files on your iPad. Fast display, quick page-turning even a thousand pages, useful finger-writing and email your notes to your friends. Differentiation-1. While turning pages of paperbooks fast, you can glance over the pages. While turning pages of pdf-notes fast, you can still run over the contents. Speedy page turning and scanning the contents with pdf-notes or paperbooks. Differentiation-2. There are many pdf readers allow you to annotate; but do you know which app allows you can write any notes in a second? If you are using pdf-notes, you may experience very fast and intuitive finger-writing like: zoom-in and note by double-tap or; writing with one finger, page-turning with two fingers, pen-changing with three fingers. - Easy importing PDF files through (DropBox, Email or Safari's) "Open In..." or iTunes - Categorized multiple bookshelves(booklists) with powerful search - Displaying pages as optimized size 1024x768 of iPad - Portrait and landscape view - Pinch zoom and crop page-margins - Fast loading and Speedy page-turning - Finger-writing with a variety of pens, highlighters and text notes - Easy "zoom-in and note" on a magnified screen by a double tap - One-step page-turning using 2 fingers on editing mode - One-step pen-changing or undo/redo using 3 fingers on editing mode - Exporting annotated PDF files to Email - External display and screen brightness controls - AirPrint and multi-tasking Misunderstandings about pdf-notes: - Not only pdf-notes but every app recently updated is removed from the open-in menu because iOS5 or formers currently show only 10 apps in open-in menu. - iPad/iphone Mail/iBooks can't display PDF annotations so that please open it in the other pdf apps. - please visit the support site for more information http://bit.ly/f6D31P Blog http://pdf-notes.com Email musebook@musebook.com Twitter http://twitter.com/musebook4u YouTube http://youtu.be/4AyRyFq9yxg NOTE: All content contained herein is subject to change without notice.

About

KERoster

Easily input and view individual schedules by date or in a monthly calendar format. This app acts as a secondary calendar, displaying schedules as icons and allowing for detailed viewing, editing, and deletion. Additional flight-related functions will be added based on user feedback.

Highlights
  • Intuitive schedule input by date
  • Calendar view with schedule icons
  • Monthly calendar overview
  • Detailed schedule view
  • Schedule editing and deletion
  • List view of monthly schedules
Features
Read full description

All users can click the leftmost upload button at the bottom of the webview to intuitively input individual schedules by clicking on the desired date while viewing the calendar. This page is the Add Schedule By DATE page. When a schedule is entered, it appears on the calendar in the form of a small icon and acts as a secondary calendar. Clicking the rightmost calendar button at the bottom of the webview will display a monthly calendar based on the entered schedule, and clicking on a date will display a detailed schedule. Clicking the airplane button at the bottom will display a monthly view of the schedule in list form, and clicking on the corresponding month will display a detailed schedule and allow editing and deletion. The webview import and home buttons are for Iflight users. We will implement additional functions necessary for flights based on feedback in the future.

Screenshots

KERoster4 screens

Verdict

The call

The clearest difference is price: KERoster at $0.49 against pdf's $9.99. KERoster also leads on rating (5.0 vs 4.4) and update cadence (every 5 days vs every 2 weeks). pdf's advantage is ratings volume (27 vs 1) and iOS requirement (16.0 vs 18.0). On review sentiment, ads, in-app purchases and monetization model 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

pdf costs $9.99 and KERoster $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

KERoster holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: pdf has 27 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 79% of pdf's written reviews are positive against 83% of KERoster's.

UpkeepUpdate frequency

pdf ships an update every 2 weeks, KERoster every 5 days. The most recent releases landed on June 10, 2026 and September 29, 2026 respectively.

Scorecard5 real differences · 5 level
pdf versus KERoster: the parameters behind the verdict, then further details
ParameterpdfKERoster
Price$9.99$0.49 — better
Rating4.4 (27 ratings)5.0 (1 ratings) — better
Positive reviews79.2% of reviews83.3% of reviews — better
Number of ratings27 — better1
Update frequencyEvery 2 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad — better
Requires iOS16.0 — better18.0
Further details — not scored
Size138 MB5 MB
Age rating4+17+
DeveloperAMuseTec Co., Ltd.JUNGSUB YOON

Customer experience

pdf

All ratings27 ratings
Positive85.2%
Neutral7.4%
Negative7.4%
Written reviews96 reviews
Positive79.2%
Neutral6.3%
Negative14.6%

KERoster

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

In-app purchases

None

pdf

No in-app purchases

None

KERoster

No in-app purchases

Questions

Is pdf free?
pdf costs $9.99, with no in-app purchases.
Is KERoster free?
KERoster costs $0.49, with no in-app purchases.
Which has better reviews, pdf or KERoster?
KERoster is rated higher. pdf averages 4.4 out of 5 from 27 ratings, while KERoster averages 5.0 from 1 ratings.
Do pdf or KERoster have ads?
Neither pdf nor KERoster shows ads.
Which is updated more often, pdf or KERoster?
pdf ships an update every 2 weeks, and KERoster every 5 days. Most recently, pdf was updated on June 10, 2026 and KERoster on September 29, 2026.

Other comparisons