Comparison

Classroom PDF vs Multiplication Ring

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

Head to head
About

Classroom PDF

This app helps educators annotate and grade PDF documents, worksheets, and slide decks directly on their iPad. It features tools for drawing, pointing, zooming, and wirelessly projecting content to a classroom projector. Organize and share annotated files with students or export them to other apps.

Highlights
  • Annotate PDFs and slides
  • Grade worksheets
  • Toggle answer covers
  • Wireless projection via AirPlay
  • Draw, point, and zoom tools
  • Organize files with categories
  • Share annotated files
Features
Read full description

Classroom PDF is designed with unique features to fit your teaching workflow. Use it to grade worksheets and walk-through answers in class. DESIGNED FOR TEACHERS There are lots of PDF apps out there, but Classroom PDF was designed specifically for classroom use. It has special features to make walking through worksheets and in-class quizzes easier. OPEN PDF FILES AND EXPORTED SLIDE DECKS Open any PDF file from other Apps (“open in…" from Dropbox etc.). You can even export PDFs directly from Keynote. ADD COVERS AND TOGGLE WITH A TAP Add covers over answers to questions, and tap to toggle them. Great for in-class quizzes or to enhance class participation. PROJECT WIRELESSLY VIA AIRPLAY Use an AppleTV or physical connector to mirror the iPad's screen to a projector. Walk around the class, and work 1:1 with students. DRAW, POINT, AND ZOOM Annotate documents with smooth ink. Write in answers or grade worksheets. Use the virtual laser-pointer to call out parts of the page. SHARE ANNOTATED FILES Email annotated or graded files to students. You can also export PDFs to 3rd party Apps such as Dropbox. STORE AND ORGANIZE ALL YOUR FILES Keep all your PDF files neatly organized with color coded categories. WE BUILD TOOLS FOR PEOPLE WHO CHANGE THE WORLD You guys have an important job, and it matters to us that you find our Apps helpful in your work. We work really hard to make sure we create the best tools possible, but we also realize that everyone's workflow is slightly different. If you have any thoughts on other features or capabilities you would find useful in your daily work, please do let us know. Your input helps us prioritize our schedules. You can reach us via the feedback page. Thanks for doing the work that you do. We hope that you find Classroom PDF helpful in its small way. Warm regards, - The App Makers @ Qrayon.

About

Multiplication Ring

Features
Read full description

Introduction The object of this game is to find two green cards in the outer ring that can be multiplied together to equal a blue product card found in the center of the ring. How to Play Choose two green cards and one blue card to create a multiplication equation. When correct, the cards will be cleared and the written equation will appear. If no cards can be played, click the “Replace Corner Cards” and new cards will appear in the four corners. If help is needed, click the help button to see a multiplication table.

Screenshots

Multiplication Ring4 screens

Verdict

The call

The clearest difference is price: Multiplication Ring at $1.99 against Classroom PDF's $9.99. Multiplication Ring also leads on in-app purchases (none vs 2) and device support (3 vs 1). Classroom PDF's advantage is update cadence (every 4 months vs every 10 months). On ads 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

Classroom PDF costs $9.99 and Multiplication Ring $1.99 up front. Classroom PDF sells 2 one-off in-app purchases. Multiplication Ring asks for nothing beyond the download.

UpkeepUpdate frequency

Classroom PDF ships an update every 4 months, Multiplication Ring every 10 months. The most recent releases landed on September 24, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
Classroom PDF versus Multiplication Ring: the parameters behind the verdict, then further details
ParameterClassroom PDFMultiplication Ring
Price$9.99$1.99 — better
Rating4.5 (15 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings15 — better—
Update frequencyEvery 4 months — betterEvery 10 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPadiPhone, iPad, iPod — better
Requires iOS15.613.0 — better
Further details — not scored
Size3 MB69 MB
Age rating4+4+
DeveloperQrayon, LLCActivities for Learning inc.

In-app purchases

2 purchases

Classroom PDF

One-time2
  • Standard PurchaseFree
  • Bonus PurchaseFree
None

Multiplication Ring

No in-app purchases

Questions

Is Classroom PDF free?
Classroom PDF costs $9.99, and also offers in-app purchases.
Is Multiplication Ring free?
Multiplication Ring costs $1.99, with no in-app purchases.
Do Classroom PDF or Multiplication Ring have ads?
Neither Classroom PDF nor Multiplication Ring shows ads.
Which is updated more often, Classroom PDF or Multiplication Ring?
Classroom PDF ships an update every 4 months, and Multiplication Ring every 10 months. Most recently, Classroom PDF was updated on September 24, 2026 and Multiplication Ring on October 12, 2026.

Other comparisons