This math app can be used to teach and study the column addition method. The app is easy to use and it has an intuitive interactive interface with customizable colors and other settings. The user can solve random or custom addition problems with small and large numbers. The number of digits in the numbers can be set.

The column addition method is also known as columnar addition, long addition or longhand addition.

Review by

"iDevBooks educational math apps make math enjoyable and entertaining. One of my sons was struggling with math and I must say the use of iDevBooks math apps has really helped him. He now enjoys his math.."

Review by professor Tim Pelton

Tim Pelton, assistant professor of Mathematics Education at the University of Victoria reviewed the sister app of column addition - column subtraction:

“Because no wrong entries are allowed the app provides a passive form of positive reinforcement and your child will likely improve in both confidence and competence with respect to the procedure.”

The interface of Column Addition app is similar to Column Subtraction.

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!"

Easy to Use

The numbers are aligned automatically and the user can concentrate on solving the operations for each column. Carrying is handled automatically and it is visualized using a nice animation.

After the user solves the operation for each column the correct answer will fly to the right place. The unit of the answer will fly under the column and the ten is carried over the next column.

If the user presses the wrong button the answer will appear above the keyboard but it will not move.

Over 20 Six-piece Picture Puzzles

The puzzles are pictures of cute animals. Every time the user solves one addition problem, he will see one more piece of a six-piece picture puzzle.

The picture puzzle feature can be turned off and on at any time.


- The user can add 2 or 3 numbers
- The app can provide random problems or the user can input his own numbers
- Each number can have from 1 to 5 digits
- The current operation for each column can be hidden
- The operands of the current operation can be highlighted
- The picture puzzle can be hidden
- Colors of the interface can be changed
- The speed of the animations can be set
- Different interface on iPhone and iPad
- Works in portrait and landscape orientation on the iPad
- Open worksheets of up to 10 problems that are made on the site

Other iDevBooks math apps

iDevBooks math apps have been reviewed and endorsed by,,, Teachers with Apps, and other respected sites and organizations.

Some of the other 24 iDevBooks math apps are Column Subtraction, Long Multiplication, Long Division, Lattice Multiplication, Visual Multiplication Table, Fraction Math, 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 to give feedback.


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.

What’s New

Version 5.2

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

Ratings and Reviews

4.0 out of 5
2 Ratings

2 Ratings

lboyiphone ,

it is usefull

The program to Primary 2 students would be useful, but also some room for improvement, for example the button a little, the lack of some special effects, such as voice, animation, such as. There are also entitled to do in the Future of Children Award. I hope that this software improve more.

AveryH ,

This is SO cool!

My 6 year old has been playing with this App since we bought it! I have to say that I am absolutely amazed by the fact that he is doing 5 digit addition on it and getting the answers right (he is in Kindergarten). The creators of this app have done a great job at helping to teach these kids a solid foundation for learning the basic fundamentals and concepts. I am finding that it is also helping my son understand the right process to do the more difficult math problems without any reminding. I am anxious to try the other math apps by this developer as my son progresses.

cjbvm ,


This is a great app to help "break down" the "carrying" of numbers! When they have the problem 26+44, they first ask the 6+4 so the child would answer 10..they show the carrying of the "1" and the next would be 1+2+4! Very nice! That saif...don't be expecting some "arcade" math game! There's enough of them out there! This is simple straight forward math and when you get a right answer, get a piece to a puzzle!


Esa Helttula
23.1 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Finnish, French, German, Spanish

Age Rating
Rated 4+
© Esa Helttula


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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