Comparison

Partial Quotients Division vs Co

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

Head to head
About

Partial Quotients Division

This educational tool teaches and reinforces the partial quotients division method through interactive problem-solving. Users can practice random or custom problems with customizable settings and receive immediate feedback on their steps.

Highlights
  • Teaches partial quotients division method
  • Interactive problem-solving
  • Customizable colors and settings
  • Random and custom problem generation
  • Immediate feedback on steps
  • Animations illustrating steps
Features
Read full description

Partial Quotients Division helps students learn and practice the partial quotients division method step by step. The app gives students a visual way to solve division problems by making a series of estimates, subtracting partial products, and adding the partial quotients together. This can make division easier to understand than the traditional long division algorithm. Students can solve randomly generated problems or enter their own division problems. The Partial Quotients Method: In the partial quotients method, students divide by making estimates that are easy for them to use. For example, in 992 ÷ 8, a student might first estimate 100, leaving 192. Then the student might estimate 20, leaving 32. Finally, 8 goes into 32 four times. The result is found by adding the partial quotients: 100 + 20 + 4 = 124. Different students can use different estimates, making the method flexible and easier to understand. Teacher endorsements: “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.” — Rita Zeni, Ecole Sandy Hill Elementary, Abbotsford, BC, Canada “There are students who see my examples who still need some guidance, and after using your app have said, ‘Now I get it.’ The feature of selecting possible solutions in each step helps some of my students who are still building their multiplication facts.” — Zachariah R. Prowell, Highlands Elementary, Edina, Minnesota, USA Features: - Step-by-step partial quotients division practice - Dividend can have 2–5 digits - Divisor can have 1 or 2 digits - Randomly generated or manually entered problems - Current operation 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 Differences Subtraction, 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

Co

This app provides advanced word prediction and spelling support for students. It offers grammar-smart suggestions and access to millions of topic-specific dictionaries to aid in writing. Built-in text-to-speech functionality helps users review their work.

Highlights
  • Grammar-smart word prediction
  • Millions of topic-specific dictionaries
  • Flexspell™ technology for spelling errors
  • Built-in text-to-speech
  • Personalized vocabulary and settings
Features
Read full description

Co:Writer® Universal app and third-party keyboard gives students easy access to word prediction on iPad, iPad Pro, iPhone, and iPod Touch. Students simply sign in to their Co:Writer Universal accounts to write with their personal settings and vocabulary. ABOUT CO:WRITER UNIVERSAL This version is for schools with a Co:Writer Universal license only. Users without a Co:Writer Universal license must purchase the Co:Writer app. HOW DOES CO:WRITER WORK? As letters are typed, Co:Writer predicts the intended word with a selection of word suggestions using powerful grammar-smart word prediction. These suggestions can be read aloud with a swipe. Selecting the intended word places it into the writing document. For feedback while writing (and after writing) built-in text to speech can be used to read letters, words, sentences, and the entire document. 4+ MILLION TOPIC-SPECIFIC DICTIONARIES Co:Writer has access to a main prediction dictionary (that includes core words) and Topic Dictionaries (that includes topic specific words). Co:Writer can access over 4 million topic-specific dictionaries which are activated based on the writing task. A small sampling of the variety of topic dictionaries: - America's Cup - Apple II - Compare and Contrast - Dinosaurs - Grumpy Cat - History of the Peloponnesian War - Mahatma Gandhi - My Dog - Pig Latin - Rolls-Royce Silver Ghost - SpongeBob SquarePants - Tommy (album) - Wonders of the World SPELLING SUPPORT Co:Writer handles the widest range of spelling mistakes through its Flexspell™technology including phonetic spelling and inventive spelling errors (letter omissions, word ending omissions, letter reversals, etc). Examples of how Co:Writer aides with phonetic and/or inventive spelling: Before Co:Writer The blk jargon flu over the bra lfnt. R u hpy to ce me? I no hw to nor the fone. After Co:Writer The black dragon flew over the gray elephant. Are you happy to see me? I know how to answer the phone. GRAMMAR SUPPORT Co:Writer bases its prediction off of proper grammar, and uses its understanding of grammar to accurately predict words within the framework of valid sentence structures. Examples of how Co:Writer aides with grammar: Dogs are furry. (noun, verb, adj.) - When you typed d-o, you get plural noun choices Three very mangy dogs ran down the street. (adj., adv., adj., noun, verb… etc.) - After typing three, very, mangy, you get plural noun choices, then you get plural verb tenses. OTHER FEATURES - Built-in Text to Speech - Export

Screenshots

Partial Quotients Division4 screens
Co4 screens

Verdict

The call

The clearest difference is review sentiment: Partial Quotients Division at 100% against Co's 8%. Partial Quotients Division also leads on rating (5.0 vs 2.6). Co's advantage is price (Free vs $3.99) and ratings volume (17 vs 2). 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

Co is free to download; Partial Quotients Division costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Partial Quotients Division holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: Co has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Partial Quotients Division's written reviews are positive against 8% of Co's.

UpkeepUpdate frequency

Partial Quotients Division ships an update every 8 months, Co every 4 months. The most recent releases landed on October 23, 2026 and October 20, 2026 respectively.

Scorecard6 real differences · 4 level
Partial Quotients Division versus Co: the parameters behind the verdict, then further details
ParameterPartial Quotients DivisionCo
Price$3.99Free — better
Rating5.0 (2 ratings) — better2.6 (17 ratings)
Positive reviews100.0% of reviews — better8.3% of reviews
Number of ratings217 — better
Update frequencyEvery 8 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.010.0 — better
Further details — not scored
Size1 MB45 MB
Age rating4+4+
DeveloperEsa HelttulaDon Johnston Incorporated

Customer experience

Partial Quotients Division

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Co

All ratings17 ratings
Positive29.4%
Neutral23.5%
Negative47.1%
Written reviews12 reviews
Positive8.3%
Neutral16.7%
Negative75.0%

In-app purchases

None

Partial Quotients Division

No in-app purchases

None

Co

No in-app purchases

Questions

Is Partial Quotients Division free?
Partial Quotients Division costs $3.99, with no in-app purchases.
Is Co free?
Co is free to download, with no in-app purchases.
Which has better reviews, Partial Quotients Division or Co?
Partial Quotients Division is rated higher. Partial Quotients Division averages 5.0 out of 5 from 2 ratings, while Co averages 2.6 from 17 ratings.
Do Partial Quotients Division or Co have ads?
Neither Partial Quotients Division nor Co shows ads.
Which is updated more often, Partial Quotients Division or Co?
Partial Quotients Division ships an update every 8 months, and Co every 4 months. Most recently, Partial Quotients Division was updated on October 23, 2026 and Co on October 20, 2026.

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