Comparison

Pure Flashcards Subtraction vs PBS Classroom

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

Head to head

Pure Flashcards Subtraction

Record behavior in classroom

Free

📚 Education

No ratingsView app →

About

Pure Flashcards Subtraction

This app offers a focused flashcard experience for learning subtraction facts. It features 126 cards covering various subtraction ranges, presented randomly for repeated practice. Designed for both classroom and home use, it requires no internet or sign-up.

Highlights

126 subtraction flashcards
Random card order
Offline access
No sign-up required
Classroom and home use
Simple two-tap start

Features

Read full description

Enjoy studying with your students and children! This is... - Pure flashcards app for math learner - Contains 3x2 types / total 252 cards (2-1 ~ 19-9 / 2-_ ~ 19-_) - Cards will be shown in random order each time - Designed for classroom and home - Just 2 taps to begin - Available anytime, anywhere There are... - No sign up process - No privacy information input process - No internet connection - No cartoon characters - No sound effects - No game contents - No in app purchase products (Pure Series)

About

PBS Classroom

Features

Read full description

This is an application that records and graphs the behavior of students and teachers in a classroom unit in a school education setting. For detailed instructions and usage manual, please visit https://apbsjapan.org/.

Screenshots

Pure Flashcards Subtraction4 screens

PBS Classroom4 screens

Verdict

The call

The clearest difference is price: PBS Classroom at Free against Pure Flashcards Subtraction's $0.99. On update cadence, ads, in-app purchases and device support 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

PBS Classroom is free to download; Pure Flashcards Subtraction costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 12 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

Scorecard1 real difference · 7 level

Pure Flashcards Subtraction versus PBS Classroom: the parameters behind the verdict, then further details
Parameter	Pure Flashcards Subtraction	PBS Classroom
Price	$0.99	Free — better
Positive reviews	100.0% of reviews	—
Update frequency	Every 12 months	Every 12 months
Ads	No	No
In-app purchases	No	No
Monetization	Paid	—
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	15.6 — better	16.0
Further details — not scored
Size	0 MB	18 MB
Age rating	4+	4+
Developer	T&T United Inc.	Kanako Otsui

In-app purchases

None

Pure Flashcards Subtraction

No in-app purchases

None

PBS Classroom

No in-app purchases

Questions

Is Pure Flashcards Subtraction free?

Pure Flashcards Subtraction costs $0.99, with no in-app purchases.

Is PBS Classroom free?

PBS Classroom is free to download, with no in-app purchases.

Do Pure Flashcards Subtraction or PBS Classroom have ads?

Neither Pure Flashcards Subtraction nor PBS Classroom shows ads.

Which is updated more often, Pure Flashcards Subtraction or PBS Classroom?

Pure Flashcards Subtraction ships an update every 12 months, and PBS Classroom every 12 months. Most recently, Pure Flashcards Subtraction was updated on November 1, 2026 and PBS Classroom on November 7, 2026.