# HearBuilder Sequencing vs Number Line, by MLC

The clearest difference is review sentiment: Number Line, by MLC at 67% against HearBuilder Sequencing's 22%. Number Line, by MLC also leads on rating (4.4 vs 2.9) and monetization model (free vs ad-supported). HearBuilder Sequencing's advantage is update cadence (every 3 months vs every 13 months) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Number Line, by MLC holds the better App Store score, 4.4 against 2.9. Both are backed by a comparable volume of ratings — 17 and 15 respectively. Written reviews point the same way: 22% of HearBuilder Sequencing's written reviews are positive against 67% of Number Line, by MLC's.

HearBuilder Sequencing ships an update every 3 months, Number Line, by MLC every 13 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | HearBuilder Sequencing | Number Line, by MLC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (17 ratings)](https://appshunter.io/ios/app/hearbuilder-sequencing/id731924449/reviews) | **[4.4 (15 ratings)](https://appshunter.io/ios/app/number-line-by-mlc/id751816884/reviews)** |
| Number of ratings | **17** | 15 |
| Positive reviews | 22.2% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 13 months |
| Monetization | Ad-supported | **Free** |
| Size | 328 MB | 7 MB |
| Requires iOS | **15.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Super Duper Publications](https://appshunter.io/developer/427263142) | [The Math Learning Center](https://appshunter.io/developer/1542700905) |

## What reviewers say

### HearBuilder Sequencing

[App page](https://appshunter.io/ios/app/hearbuilder-sequencing/id731924449)

This educational app helps children develop sequencing skills through interactive activities and games. It offers customizable levels and progress tracking for multiple students, progressing from simple 2-step sequences to more complex 6-step tasks.

**Highlights:** Illustrated sequencing activities, Progressive difficulty levels (2-6 steps), Reward arcade games, Progress monitoring and data tracking, Customizable settings and reports, Audio and text options

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Number Line, by MLC

[App page](https://appshunter.io/ios/app/number-line-by-mlc/id751816884)

This app allows students to visualize number sequences and demonstrate mathematical strategies. It supports various number types and offers tools for annotation, problem-solving, and sharing work. Ideal for elementary classrooms and iPad learning environments.

**Highlights:** Visualize number sequences, Demonstrate counting, adding, subtracting, multiplying, dividing, Use whole numbers, fractions, decimals, or negative numbers, Add custom tick marks and labels, Hide and reveal numbers and jumps, Annotation and drawing tools, Save and share work

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HearBuilder Sequencing free?

HearBuilder Sequencing is free to download, with no in-app purchases.

### Is Number Line, by MLC free?

Number Line, by MLC is free to download, with no in-app purchases.

### Which has better reviews, HearBuilder Sequencing or Number Line, by MLC?

Number Line, by MLC is rated higher. HearBuilder Sequencing averages 2.9 out of 5 from 17 ratings, while Number Line, by MLC averages 4.4 from 15 ratings.

### Do HearBuilder Sequencing or Number Line, by MLC have ads?

Neither HearBuilder Sequencing nor Number Line, by MLC shows ads.

### Which is updated more often, HearBuilder Sequencing or Number Line, by MLC?

HearBuilder Sequencing ships an update every 3 months, and Number Line, by MLC every 13 months. Most recently, HearBuilder Sequencing was updated on November 6, 2026 and Number Line, by MLC on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*