# Number Rack, by MLC vs Preschool Data Toolbox

The clearest difference is rating: Preschool Data Toolbox at 5.0 against Number Rack, by MLC's 3.2. Preschool Data Toolbox also leads on update cadence (fortnightly vs every 25 months) and iOS requirement (11.0 vs 14.7). Number Rack, by MLC's advantage is ratings volume (9 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.

Preschool Data Toolbox holds the better App Store score, 5.0 against 3.2. Both are backed by a comparable volume of ratings — 9 and 2 respectively.

Number Rack, by MLC ships an update every 25 months, Preschool Data Toolbox fortnightly. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Number Rack, by MLC | Preschool Data Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (9 ratings)](https://appshunter.io/ios/app/number-rack-by-mlc/id1469094747/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/preschool-data-toolbox/id1609460161/reviews)** |
| Number of ratings | **9** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 4 MB | 53 MB |
| Requires iOS | 14.7 | **11.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Math Learning Center](https://appshunter.io/developer/1542700905) | [WGBH](https://appshunter.io/developer/324170330) |

## What reviewers say

### Number Rack, by MLC

[App page](https://appshunter.io/ios/app/number-rack-by-mlc/id1469094747)

This virtual manipulative tool helps children develop number sense through interactive bead groupings. It supports exploration of addition and subtraction strategies with customizable rows and colors. Ideal for elementary classrooms, it includes annotation and sharing features.

**Highlights:** 1-10 rows of 10 beads, Resizable bead covers for subtraction, Color-coded bead rows, Annotation and drawing tools, Math text and writing tools, Shareable work via image or code

**Features:** macOS Compatibility

**In-app purchases:** none


### Preschool Data Toolbox

[App page](https://appshunter.io/ios/app/preschool-data-toolbox/id1609460161)

This app helps young children collect, visualize, and analyze data through interactive investigations. It supports the development of early math skills, computational thinking, and problem-solving with engaging activities and discussion prompts.

**Highlights:** 6 pre-made investigations, Create custom investigations, Data collection within the app, Visualize data with graphs, Data analysis and sorting tools, Discussion prompts for learning, Teacher's Guide with lesson plans

**In-app purchases:** none


## Frequently asked questions

### Is Number Rack, by MLC free?

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

### Is Preschool Data Toolbox free?

Preschool Data Toolbox is free to download, with no in-app purchases.

### Which has better reviews, Number Rack, by MLC or Preschool Data Toolbox?

Preschool Data Toolbox is rated higher. Number Rack, by MLC averages 3.2 out of 5 from 9 ratings, while Preschool Data Toolbox averages 5.0 from 2 ratings.

### Do Number Rack, by MLC or Preschool Data Toolbox have ads?

Neither Number Rack, by MLC nor Preschool Data Toolbox shows ads.

### Which is updated more often, Number Rack, by MLC or Preschool Data Toolbox?

Number Rack, by MLC ships an update every 25 months, and Preschool Data Toolbox fortnightly. Most recently, Number Rack, by MLC was updated on October 24, 2026 and Preschool Data Toolbox on October 13, 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.*