# Number Line, by MLC vs Terrific Triangle

The clearest difference is rating: Number Line, by MLC at 4.4 against Terrific Triangle's 4.0. Number Line, by MLC also leads on ratings volume (15 vs 5). Terrific Triangle's advantage is device support (3 vs 1) and iOS requirement (12.0.0 vs 16.1). On price, review sentiment, update cadence and ads 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 4.0. Both are backed by a comparable volume of ratings — 15 and 5 respectively. Written reviews split almost evenly too, at 67% and 67% positive.

Number Line, by MLC ships an update every 13 months, Terrific Triangle every 10 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Number Line, by MLC | Terrific Triangle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (15 ratings)](https://appshunter.io/ios/app/number-line-by-mlc/id751816884/reviews)** | [4.0 (5 ratings)](https://appshunter.io/ios/app/terrific-triangle/id1341995236/reviews) |
| Number of ratings | **15** | 5 |
| Positive reviews | 66.7% of reviews | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 10 months** |
| Monetization | Free | Free |
| Size | 7 MB | 32 MB |
| Requires iOS | 16.1 | **12.0.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Math Learning Center](https://appshunter.io/developer/1542700905) | [Elementary Software](https://appshunter.io/developer/525377644) |

## What reviewers say

### 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


### Terrific Triangle

[App page](https://appshunter.io/ios/app/terrific-triangle/id1341995236)

Practice math fact families for addition, subtraction, multiplication, and division. This educational tool offers individual fact practice with a score and adjustable difficulty, including an optional timer. It's a free, ad-free way to master number relationships.

**Highlights:** Fact family practice, Addition/subtraction drills, Multiplication/division drills, Adjustable difficulty, Optional timer, Running score

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Number Line, by MLC free?

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

### Is Terrific Triangle free?

Terrific Triangle is free to download, with no in-app purchases.

### Which has better reviews, Number Line, by MLC or Terrific Triangle?

Number Line, by MLC is rated higher. Number Line, by MLC averages 4.4 out of 5 from 15 ratings, while Terrific Triangle averages 4.0 from 5 ratings.

### Do Number Line, by MLC or Terrific Triangle have ads?

Neither Number Line, by MLC nor Terrific Triangle shows ads.

### Which is updated more often, Number Line, by MLC or Terrific Triangle?

Number Line, by MLC ships an update every 13 months, and Terrific Triangle every 10 months. Most recently, Number Line, by MLC was updated on November 6, 2026 and Terrific Triangle on November 2, 2026.

---

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