# Number Line, by MLC vs TurtleDiary

The clearest difference is rating: Number Line, by MLC at 4.4 against TurtleDiary's 3.1. Number Line, by MLC also leads on review sentiment (67% vs 29%) and in-app purchases (none vs 9). TurtleDiary's advantage is update cadence (every 2 months vs every 13 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. TurtleDiary sells 9 in-app purchases, starting at $5.99 per month. Number Line, by MLC asks for nothing beyond the download.

Number Line, by MLC holds the better App Store score, 4.4 against 3.1. Both are backed by a comparable volume of ratings — 15 and 55 respectively. Written reviews point the same way: 67% of Number Line, by MLC's written reviews are positive against 29% of TurtleDiary's.

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

## The numbers

| Metric | Number Line, by MLC | TurtleDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (15 ratings)](https://appshunter.io/ios/app/number-line-by-mlc/id751816884/reviews)** | [3.1 (55 ratings)](https://appshunter.io/ios/app/turtlediary/id1154882234/reviews) |
| Number of ratings | 15 | **55** |
| Positive reviews | **66.7% of reviews** | 29.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 306 MB |
| Requires iOS | 16.1 | **11.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The Math Learning Center](https://appshunter.io/developer/1542700905) | [TurtleDiary LLC](https://appshunter.io/developer/1036119438) |

## 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


### TurtleDiary

[App page](https://appshunter.io/ios/app/turtlediary/id1154882234)

Interactive educational games, videos, quizzes, and worksheets for K-5 students. Covers math, language, typing, science, and geography to enhance classroom success and retention.

**Highlights:** 500+ educational games, 350+ learning videos, 500+ online quizzes, Interactive math games, Language and art games, Typing lessons, Multiplayer games

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Turtlediary Family Monthly Subscription | $5.99 | per month |
| Turtlediary Enterprise Monthly Subscription | $29.49 | per month |
| Turtlediary Family Annual Subscription | $49.99 | per year |
| Annual Parent Membership | $69.99 | per year |
| Turtlediary Enterprise Annual | $79.99 | per year |
| Turtlediary Enterprise Annual | $189.99 | per year |
| Annual Teacher Membership | $199.99 | per year |
| Turtlediary Family Annual | $69.99 | one-time |
| TurtleDiary Teacher Annual | $199.99 | one-time |


## Frequently asked questions

### Is Number Line, by MLC free?

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

### Is TurtleDiary free?

TurtleDiary is free to download, with in-app purchases available.

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

Number Line, by MLC is rated higher. Number Line, by MLC averages 4.4 out of 5 from 15 ratings, while TurtleDiary averages 3.1 from 55 ratings.

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

Neither Number Line, by MLC nor TurtleDiary shows ads.

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

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