# Lattice Multiplication

> Interactive app for learning and practicing lattice multiplication methods. (iPhone/iPad app by Esa Helttula.)

- Source: https://appshunter.io/ios/app/lattice-multiplication/id351024204 (this page in markdown: same URL + `.md`)
- Developer: [Esa Helttula](https://appshunter.io/developer/339440196)
- Category: Education
- Price: $3.99
- Rating: 5.00/5 from 1 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 1 MB
- Languages: American English
- Released: 2010-02-23
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/lattice-multiplication/id351024204/reviews.md

## What is Lattice Multiplication?

This app can be used to teach and study the ancient lattice multiplication method. Solving lattice multiplication problems is also excellent times tables practice. The app is very easy to use and it has an intuitive interface with customizable colors and other settings. The user can solve custom and random multiplication problems with small and large numbers.

Reviewed by Wired.com:

"This was one form of multiplication that I’d never done before, but the app taught me very clearly. It makes multiplying large numbers easier, and allows you to see it all visually"

Endorsed by teachers

Rita Zeni, Ecole Sandy Hill Elementary, Abbotsford, BC, Canada:

"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. Being able to adjust the level of difficulty to suit their needs is also very motivating for the students. I am so glad to have come across this great educational tool!"

The Lattice Multiplication Method

Lattice multiplication is algorithmically equivalent to long multiplication. A lattice (a grid) guides the calculation. All the multiplications are done first and then the additions. The method was introduced to Europe in 1202 in Fibonacci's Liber Abaci. 

In this groundbreaking book Fibonacci presented many algorithms for working with Arabic numerals. Ancient Indians and Chinese originally invented some of the algorithms. Fibonacci presented both the current standard long multiplication and also an originally Indian method called lattice multiplication, which is faster and more compact for working with larger numbers.

The Lattice Multiplication app

The Lattice Multiplication app allows the user to solve a lattice multiplication problem step by step and animates all the steps. In the steps the user will multiply or add. The correct answer will fly to the right place. If the user presses the wrong button the answer will appear above the keyboard but it will not move. 

Settings:

- The multiplicand can have up to 5 digits
- The multiplier can have up to 3 digits
- Custom and random problems
- The current operation for each step can be hidden
- The operands for the current operation can be highlighted
- There are 3 different themes: black, gray and gold
- The speed of the animations can be set
- Different interface on iPhone and iPad 

Other iDevBooks math apps 

iDevBooks math apps have been reviewed and endorsed by Wired.com, IEAR.org, Edudemic.com, Teachers with Apps, and other respected sites and organizations. 

Some of the other 40 iDevBooks math apps are Column Addition, Long Multiplication, Long Division, Column Subtraction, Visual Multiplication Table, Partial Differences Subtraction, Partial Quotients Division, Partial Sums Addition, Decimal Rounding, etc. 

Feedback and requests for new features 

New ideas to make this app better are welcome. Please visit idevbooks.com to give feedback. 

Privacy 

This app has no ads or in-app purchases and it does not transmit any data during the operation of the app. This app also does not contain any links to other apps or the web.

## Key features

- Step-by-step lattice multiplication guide
- Custom and random problem generation
- Visual animation of calculation steps
- Adjustable difficulty and settings
- Intuitive interface with customizable themes
- Reinforces times tables practice

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/lattice-multiplication/id351024204/reviews.md

### 5/5 — Makes Math Fun.

*2012-10-13*

This app makes doing math really fun. I like how you can change how many numbers will be in the problem.

### 5/5 — Nice!

*2010-10-05*

I like trying out different ways to show my kids how to do math.  One of my favorite things about this app is that nothing really bad happens if you tap on the wrong number.  It just waits for you to try again -- doesn't add to math anxiety!

### 5/5 — Great app!

*2010-09-05*

Seems to work well with Everyday Math. Apps from this developer are easy to use and they do what you paid your money for them to do!

### 5/5 — Awesome

*2010-08-16*

Makes math fun and I am 9

## Frequently asked questions about Lattice Multiplication

### What is Lattice Multiplication?

Lattice multiplication is a method of multiplication that uses a grid (lattice) to guide the calculation. All multiplications are done first, followed by additions, making it an alternative to standard long multiplication.

### How does Lattice Multiplication teach the method?

The app animates each step of the lattice multiplication process. Users perform multiplications and additions, with correct answers visually moving into place, providing immediate feedback.

### Can I practice with my own numbers in Lattice Multiplication?

Yes, the app allows users to solve custom multiplication problems. The multiplicand can have up to 5 digits and the multiplier up to 3 digits.

### What settings are available in Lattice Multiplication?

Users can customize themes (black, gray, gold), adjust animation speed, hide current operations, highlight operands, and choose between iPhone and iPad interfaces.

### Is Lattice Multiplication suitable for all ages?

The app has an age rating of 4+, making it suitable for younger learners and those needing to practice multiplication fundamentals. Teachers have endorsed it for reinforcing computation strategies.

### Does Lattice Multiplication have ads?

No, Lattice Multiplication does not contain advertisements. It is a paid application designed for focused learning without interruptions.

### What devices does Lattice Multiplication support?

Lattice Multiplication is available on iPhone, iPad, and iPod devices, offering a consistent experience across Apple platforms.

### How often is Lattice Multiplication updated?

The app was last updated on October 14, 2021, with its latest version being 6.5. Updates typically include improvements and new features based on user feedback and educational advancements.

## Version history (last 5 releases)

### 6.5 — 2021-10-14

- support for iOS 15

### 6.0 — 2019-09-30

- support for iOS 13
- new interface with support for latest iPad and iPhone models
- new theme colors

### 5.2 — 2018-11-13

- support for iOS 12
- support for iPhone Xr and Xs Max
- minor bug fixes

### 5.1 — 2018-03-27

- support for iOS 11
- support for iPhone X

### 5.0 — 2017-02-15

- open worksheets from app (new worksheets can be made on the iDevBooks.com site)
- support for iOS 10.0
- support for shared iPad in school environments

For more information about worksheets and other new features of this version please visit idevbooks.com. Please also get in contact if you have any feedback or you want information about 32 iDevBooks math apps.

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## More apps by Esa Helttula

- [Column Addition](https://appshunter.io/ios/app/column-addition/id339440193)
- [Column Subtraction](https://appshunter.io/ios/app/column-subtraction/id341040894)
- [Long Division](https://appshunter.io/ios/app/long-division/id341041204)
- [Long Multiplication](https://appshunter.io/ios/app/long-multiplication/id345037369)
- [Partial Sums Addition](https://appshunter.io/ios/app/partial-sums-addition/id351022022)
- [Trade-First Subtraction](https://appshunter.io/ios/app/trade-first-subtraction/id351022585)

All apps by Esa Helttula: https://appshunter.io/developer/339440196

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*