# Relational Rods+ by mathies

> Interactive digital rods for visualizing and operating on numbers, fractions, and decimals. (iPhone/iPad app by OAME.)

- Source: https://appshunter.io/ios/app/relational-rods-plus-by-mathies/id960682555 (this page in markdown: same URL + `.md`)
- Developer: [OAME](https://appshunter.io/developer/868343673)
- Category: Education
- Price: Free
- Rating: 4.00/5 from 6 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 35 MB
- Languages: English
- Released: 2016-03-30
- Data updated: 2026-05-16
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/relational-rods-plus-by-mathies/id960682555/reviews.md

## What is Relational Rods+ by mathies?

Represent, compare, order, and operate on whole numbers, fractions or decimals by dragging rods from the tower into the workspace and manipulating them.

Relational Rods are rectangles of various lengths where each rod can be evenly subdivided by the smallest square rod.  Whole Number Rods are rectangles of lengths 1 to 10  with numeric labels and dashed divisions on each rod. Decimal Rods are rectangles of lengths 0.1 to 1.0  with numeric labels and dashed divisions on each rod. 

Mathematical Concepts:
Create visual representations that help explore mathematical thinking related to:
• Exploring number patterns and concepts
• Representing, comparing and ordering whole numbers, fractions or decimals
• Composing and decomposing numbers
• Skip counting forwards and backwards
• Adding, subtracting, multiplying and dividing
• Proportional reasoning
• Exploring rectangular areas

Features:
• Show or hide the numerical labels on the rods.
• Show or hide the dashed separations on the rods.
• Set the colour of individual rods or the colour scheme for the entire set of rods.  The “traditional” palette allows the digital tool to more closely match the colours of the concrete manipulatives used in classrooms.
• Hide some of the rods in order to work with a restricted set.
• Select a rod or set of rods by drawing a marquee around them.  Click on a rod to add or remove it from the selection.
• Copy selected rods.
• Rotate selected rods.
• Show or hide the background grid.
• Activate or deactivate Snap to Grid mode. When active, rods snap to discrete positions making it easier to align them.  Deactivation allows the free placement of rods.
• Hide/show the ruler at the bottom of the work space.
• Step through a history of your work with the undo/redo buttons.
• Communicate your thinking or highlight various features of your representation using the built-in annotation tool.

## Key features

- Represent whole numbers, fractions, and decimals
- Compare and order numbers
- Perform arithmetic operations
- Explore number patterns
- Customize rod colors and visibility
- Annotation tool for explanations

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/relational-rods-plus-by-mathies/id960682555/reviews.md

### 5/5 — Amazingly bad

*2020-05-04, version 2.1.0*

Hi

### 1/5 — Doo Doo

*2019-04-09, version 2.0.2*

Math sucks.

### 5/5 — Love it!

*2018-06-19, version 2.0.2*

Relational rods are so powerful and this app makes them even easier to access from home and at school. Free from advertisements and free -- what more can I say?

### 5/5 — Awesome!

*2018-03-26*

Thanks for creating a really helpful app! It is packed with lots of features and has a great layout. I used this app to create a video for a school project requiring the use of manipulatives and it worked out really well! Would recommend and will keep using and sharing! Thank you!

## Frequently asked questions about Relational Rods+ by mathies

### What mathematical concepts can I explore with Relational Rods+?

Relational Rods+ helps explore number patterns, representing and comparing whole numbers, fractions, and decimals, composing and decomposing numbers, skip counting, and performing addition, subtraction, multiplication, and division.

### What devices does Relational Rods+ support?

Relational Rods+ is available on iPhone, iPad, and iPod, making it accessible for a range of Apple mobile devices.

### Is Relational Rods+ suitable for young children?

With an age rating of 4+, Relational Rods+ is designed to be accessible for young learners to begin exploring fundamental mathematical concepts visually.

### How often is Relational Rods+ updated?

The app was last updated on August 17, 2019, with version 2.1.0. While updates may not be frequent, the core functionality remains stable for educational use.

### Can I customize the appearance of the rods in Relational Rods+?

Yes, you can show or hide numerical labels and dashed separations on the rods. You can also set individual rod colors or choose a color scheme for the entire set.

### Does Relational Rods+ offer offline functionality?

The provided description does not specify offline capabilities. However, educational apps of this nature typically function without a constant internet connection once installed.

### What is the user sentiment for Relational Rods+?

Relational Rods+ has a rating of 4.0 stars from 6 ratings, indicating generally positive user feedback on its educational utility.

### Does Relational Rods+ have ads?

No, Relational Rods+ does not contain advertisements, providing an uninterrupted learning experience for users.

## Version history (last 5 releases)

### 2.1.0 — 2019-08-17

- improved undo/redo of image steps 
- updated support docs
- bug fixes

### 2.0.2 — 2018-05-01

• give access to the iOS Files app
• use Open File and Open File from WWW to import images
• bug fixes

### 2.0.0 — 2018-02-12

• New annotation drawing objects (rulers, number lines, grids, hops and polygons)
• Annotation is scaled as objects are resized
• Opened files contain the final annotation step which is not affected by Undo and Redo

### 1.2.5 — 2017-06-21

- files are saved in standard XML format
- files of type .relrods, .xml and .txt can be opened
 - bug fixes related to save and load buttons not functioning

### 1.2.3 — 2017-06-20

- allow file sharing through iTunes

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## More apps by OAME

- [Rekenrek by mathies](https://appshunter.io/ios/app/rekenrek-by-mathies/id868343670)
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- [Money by mathies](https://appshunter.io/ios/app/money-by-mathies/id969207051)
- [Colour Tiles by mathies](https://appshunter.io/ios/app/colour-tiles-by-mathies/id1170196025)
- [Set Tool by mathies](https://appshunter.io/ios/app/set-tool-by-mathies/id1170210844)

All apps by OAME: https://appshunter.io/developer/868343673

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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 2026-05-16.*