8 Apps in This Bundle

iPad Screenshots


This bundle has 8 iDevBooks visual math apps that build conceptual understanding. Save 50% compared to buying the apps separately.

Visual Fractions Decimals and Percentages

This math app is about visually exploring how percentages and decimals are just special kinds of fractions with their own notation. There are no tasks to complete or problems to solve. The purpose is to build conceptual understanding.

By painting different grids and circles with one or more colors students can see how their coloring changes the fraction, decimal, and percentage amounts of those colors. Grids and circles can be very simple and have only 1 square or sector, or very large with up to 10,000 squares or 360 sectors.

The app has been featured by Apple in "Education - Middle School" and ‘Education - Best New Apps’

Fraction as Slope

The Fraction as Slope app provides algebra students a new visual way to think about slope and fractions by showing how fractions are slopes. This provides an opportunity to increase conceptual understanding of both fractions and slopes.

Students can explore, compare, add, subtract, reduce, and expand positive and negative fractions just by drawing and moving graphs of lines.


-Explore equivalence classes of fractions
-Visually compare fractions using slopes
-Visually reduce and expand fractions
-Learn a new visual way to add and subtract fractions with uncommon denominators

Visual Multiplication Table

Multiplication Table is a groundbreaking new way to visualize and interact with the multiplication table. It is created by a lover of math who appreciates the patterns and order to be found within the discipline. The multiple exploratory ways to interact with the multiplication table will help you teach your child to think about multiplication as a visual, orderly, and most importantly – understandable concept.

Wired.com: "I highly recommend it for any kid who is learning their multiplication tables".

The app has been featured by Apple in "Education - New & Noteworthy’

Multi-touch Fractions

Explore division of one unit into fractions with multi-touch. Touch any fraction of the unit with two or more fingers to further divide it by the number of touches. Touch two or more fractions with the same denominator to add them.

In addition to open ended exploration, search given fractions by dividing and adding fractions until you find the correct fraction. You can also set your own fractions to search.

Each fraction has its unique color which creates harmonious and beautiful combinations of fractions.

Place Value Multiplication, Place Value Division, Place Value Addition, and Place Value Subtraction

Understanding the concept of places and values in the base then system is essential for long-term understanding. Visually perform basic arithmetic using place value discs.


The apps have no ads or in-app purchases and they do not transmit any data during the operation of the app. The apps also do not contain any links to other apps or the web.


Videos of the apps can be found at idevbooks.com.


Esa Helttula
14.8 MB
Requires iOS 8.0 or later. Compatible with iPad.
Age Rating
Rated 4+
© Esa Helttula
App Bundle $15.99


  • Family Sharing

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

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