# Number Line — Learn to round, add, subtract

> Interactive number line for math education and games. (iPhone/iPad app by Blastoff Design.)

- Source: https://appshunter.io/ios/app/number-line/id1531893217 (this page in markdown: same URL + `.md`)
- Developer: [Blastoff Design](https://appshunter.io/developer/1455360972)
- Category: Education, Utilities
- Price: Free
- Rating: 5.00/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 16 MB
- Languages: American English
- Released: 2020-10-17
- Data updated: 2026-07-17
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/number-line/id1531893217/reviews.md

## What is Number Line?

An infinite number line to use in the classroom, with a simple design that allows for numerous maths games and challenges!

• Ask the class to round to the nearest 10/100/10,000.
• Visualise the size of numbers relative to one another, including negatives.

How to use:
• Zoom with a pinch
• Swipe along the number line
• Go to a number by typing in the search box
• Drag and drop pins to mark numbers
• Draw free-hand with the pen tool

## Key features

- Infinite number line visualization
- Rounding practice (nearest 10, 100, 10,000)
- Number comparison
- Pinch-to-zoom functionality
- Swipe navigation
- Search for specific numbers
- Pin marking
- Freehand drawing tool

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/number-line/id1531893217/reviews.md

### 5/5 — Intuitive

*2022-07-19*

This is an excellent teaching tool. I’m a math tutor, and it’s definitely one of my more often used apps. I do wish I could make the number line vertical though. I can imitate it by rotating my iPad, but that makes the numbers harder to read, and some of my students are dyslexic. Also, if there were an option to pay a couple of dollars to get an add-free version I would. The ads aren’t too intrusive, but I’d be happy to support the developers and get a cleaner version.

### 5/5 — Simple and intuitive

*2020-12-03*

This will be a great app for teaching my young child about numbers. It’s simple and easy to use. Thank you for making it!

## Frequently asked questions about Number Line

### What is the learning methodology of Number Line?

Number Line utilizes a visual and interactive approach to learning. It allows users to explore number relationships, practice rounding to various place values, and engage in math games directly on an infinite number line.

### How does Number Line track user progress?

The current description does not specify built-in progress tracking features. However, educators can use the interactive tools like pins and drawing to assess student understanding during activities.

### Does Number Line offer any certifications?

Number Line is an educational tool designed for practice and visualization, and it does not offer formal certifications upon completion of any modules.

### What devices is Number Line compatible with?

Number Line is available for iPhone, iPad, and iPod devices, supporting a wide range of iOS users.

### What is the age rating for Number Line?

Number Line has an age rating of 4+, making it suitable for young children and early learners.

### How often is Number Line updated?

The latest version is 0.3.0, and the app was last updated on December 29, 2025. Specific update frequency is not detailed, but this indicates recent development.

### Does Number Line have ads?

No, Number Line is ad-free, providing an uninterrupted learning experience for users.

### What do users like most about Number Line?

Based on the limited ratings, users appreciate its simple design and the numerous math games and challenges it enables, as well as its utility in the classroom.

## Version history (last 5 releases)

### 0.3.0 — 2025-12-29

Drawing, search box, regional formatting, and bigger numbers!

Tell us what you'd like to see next: numberline@blastoff.design

### 0.2.0 — 2023-12-05

Performance & stability improvements

### 0.1.2 — 2021-05-11

We've published a helpful guide to the app! Just tap the question mark.

### 0.1.1 — 2020-11-21

We've published a helpful guide to the app! Just tap the three dots: ...

### 0.1.0 — 2020-10-17

No release notes.

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## More apps by Blastoff Design

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All apps by Blastoff Design: https://appshunter.io/developer/1455360972

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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 2026-07-17.*