# Number Line, by MLC vs K

The clearest difference is rating: K at 5.0 against Number Line, by MLC's 4.4. K also leads on update cadence (every 4 months vs every 13 months) and iOS requirement (10.0 vs 16.1). Number Line, by MLC's advantage is ratings volume (15 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

K holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Number Line, by MLC has 15 ratings behind it against 2, so its average is the more settled of the two.

Number Line, by MLC ships an update every 13 months, K every 4 months. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Number Line, by MLC | K |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (15 ratings)](https://appshunter.io/ios/app/number-line-by-mlc/id751816884/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/k-2-math-tools/id1000444174/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 7 MB | 35 MB |
| Requires iOS | 16.1 | **10.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Math Learning Center](https://appshunter.io/developer/1542700905) | [Classroom Focused Software](https://appshunter.io/developer/406741679) |

## 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


### K

[App page](https://appshunter.io/ios/app/k-2-math-tools/id1000444174)

This app provides a collection of interactive math tools for kindergarten through second-grade classrooms. It includes manipulatives like base 10 blocks, counters, and number lines, along with grids and a basic calculator to aid in problem-solving.

**Highlights:** Marker board, Base 10 blocks (1s & 10s), Counters, 10 frames, Number line, Addition grids, 100s chart, Basic calculator

**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 K free?

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

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

K is rated higher. Number Line, by MLC averages 4.4 out of 5 from 15 ratings, while K averages 5.0 from 2 ratings.

### Do Number Line, by MLC or K have ads?

Neither Number Line, by MLC nor K shows ads.

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

Number Line, by MLC ships an update every 13 months, and K every 4 months. Most recently, Number Line, by MLC was updated on October 9, 2026 and K on October 24, 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.*