Comparison

Partial Difference Subtraction vs LingoAce for Student

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

Head to head
About

Partial Difference Subtraction

Features
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Partial Differences Subtraction helps students learn and practice the partial differences subtraction method step by step. The app gives students a visual way to subtract numbers by working with each place value separately. The partial differences are then combined to find the final answer. Students can solve randomly generated problems or enter their own subtraction problems. The number of digits can be adjusted for different skill levels. The Partial Differences Method: In the partial differences method, each place value is subtracted separately from left to right. For example, in 936 − 580, the partial differences are 400, −50, and 6. These are then combined to get the final answer: 356. Teacher endorsement: “The math apps by Esa Helttula allow students to practice and reinforce the specific computation strategies taught in class, with as much or as little scaffolding as necessary. They also provide individualized feedback to each student, with an immediacy that is not always possible through pencil and paper practice.” — R. Zeni, Ecole Sandy Hill Elementary, Abbotsford, BC, Canada Easy to Use: The numbers are aligned automatically so students can focus on solving each column. After the student solves the operation for each column, the correct answer moves into the right place. If the student presses the wrong button, the answer appears above the keyboard but does not move. Features: - Step-by-step partial differences subtraction practice - Each number can have 2–3 digits - Randomly generated or manually entered problems - Current operation for each column can be hidden - Operands of the current operation can be highlighted - Customizable interface colors - Adjustable animation speed Other iDevBooks Math Apps: Other iDevBooks math apps include Column Addition, Long Multiplication, Long Division, Column Subtraction, Visual Multiplication Table, Partial Quotients Division, Partial Products Multiplication, Partial Sums Addition, Decimal Rounding, and more. Feedback: New ideas to make this app better are welcome. Please visit idevbooks.com to give feedback. Privacy: This app has no ads, no in-app purchases, and does not transmit user data during operation. The app also does not contain links to other apps or to the web.

About

LingoAce for Student

This platform offers live online classes for children aged 3-15 to learn Mandarin Chinese, English, and Math. It connects students with certified teachers for personalized, engaging instruction to build confidence and academic skills.

Highlights
  • Live 1-on-1 and group classes
  • Certified native-speaking teachers
  • Curriculum aligned with global standards
  • Interactive courseware and gamified practice
  • Personalized learning for all levels
  • Singapore Math method for logic skills
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Inspire Young Learners with Live Online Classes for Chinese, English, Math & More. LingoAce is an award-winning online learning platform offering engaging, personalized instruction in Mandarin Chinese, English and Math for kids ages 3–15. With 20M+ live classes delivered to students in 110+ countries, we connect young learners with professionally certified teachers – anytime, anywhere. Whether your child is just starting out or aiming for academic excellence, LingoAce helps them build confidence, fluency, and critical thinking skills through immersive, expert-led lessons. LingoAce Chinese The best way for kids to learn Mandarin Chinese Designed for ages 3–15, our research-based curriculum helps children speak, listen, read, and write in Chinese with confidence. Why families love it: - Live 1-on-1 or group classes with native, accredited Chinese teachers - Curriculum aligned with HSK, AP Chinese, and global language standards - Interactive courseware with games, picture books & fun homework - Supports all levels & bilingual backgrounds LingoAce English Build real fluency with native English teachers For learners ages 4–11, our English program combines proven techniques and native-speaking teachers to spark language growth. Program highlights: - TEFL-certified British & American teachers with TPR techniques - Curriculum aligned with CEFR language standards - Engaging storytelling, gamified practice & closed-loop review - Helps children excel in listening, speaking, reading, and writing LingoAce Math Master math with the proven Singapore Math method Ideal for ages 5–15, our Math program strengthens logic and analytical skills in a fun, collaborative way. Why parents choose LingoAce Math: - Developed by the Stanford Doctor - Aligns with US CCSS standards - Small class sizes (max 6 students) for personalized learning - Prepares for Olympiad Math and academic excellence About Us Founded in 2017, LingoAce is a global edtech company headquartered in Singapore with teams across the US, Europe, China, and Southeast Asia. We have over 5,000 certified teachers and are proud to have taught more than 20 million classes to PreK-12 learners worldwide. Recognized by: - Fast Company’s World’s Most Innovative Companies (2023) - GSV EdTech 150 (2022 & 2023) Support & Contact Website: www.lingoace.com Email: welcome@lingoace.com Follow us: - Facebook: LingoAce Global - Instagram: @lingoaceus - Twitter: @LingoAce Love our app? Leave us a review – we’d love to hear from you!

Screenshots

Partial Difference Subtraction4 screens
LingoAce for Student4 screens

Verdict

The call

The clearest difference is price: LingoAce for Student at Free against Partial Difference Subtraction's $3.99. LingoAce for Student also leads on update cadence (every 3 weeks vs every 9 months) and iOS requirement (13.0 vs 17.6). On 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

LingoAce for Student is free to download; Partial Difference Subtraction costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Partial Difference Subtraction ships an update every 9 months, LingoAce for Student every 3 weeks. The most recent releases landed on October 8, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
Partial Difference Subtraction versus LingoAce for Student: the parameters behind the verdict, then further details
ParameterPartial Difference SubtractionLingoAce for Student
Price$3.99Free — better
Rating—3.9 (793 ratings) — better
Positive reviews—59.2% of reviews
Number of ratings—793 — better
Update frequencyEvery 9 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.613.0 — better
Further details — not scored
Size1 MB278 MB
Age rating4+4+
DeveloperEsa HelttulaPPLINGO Pte Ltd

Bugs and requests

Partial Difference Subtraction

Not enough reviews yet to summarise bugs or requests.

LingoAce for Student

Reported bugs

4 issues
  • Frequent app crashes
  • Issues with homework submission
  • Microphone and camera not working properly
  • Inconsistent grading by AI

Requested features

4 requests
  • Add shorter class duration option
  • Improve homework submission process
  • Enhance audio and video quality
  • Provide more engaging lesson content

In-app purchases

None

Partial Difference Subtraction

No in-app purchases

None

LingoAce for Student

No in-app purchases

Questions

Is Partial Difference Subtraction free?
Partial Difference Subtraction costs $3.99, with no in-app purchases.
Is LingoAce for Student free?
LingoAce for Student is free to download, with no in-app purchases.
Do Partial Difference Subtraction or LingoAce for Student have ads?
Neither Partial Difference Subtraction nor LingoAce for Student shows ads.
Which is updated more often, Partial Difference Subtraction or LingoAce for Student?
Partial Difference Subtraction ships an update every 9 months, and LingoAce for Student every 3 weeks. Most recently, Partial Difference Subtraction was updated on October 8, 2026 and LingoAce for Student on October 26, 2026.

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