# Number Rack, by MLC vs Owlet

The clearest difference is rating: Number Rack, by MLC at 3.2 against Owlet's 1.0. Number Rack, by MLC also leads on ratings volume (9 vs 1). Owlet's advantage is update cadence (every 6 months vs every 25 months) and iOS requirement (12.0 vs 14.7). On price, ads, in-app purchases and device support there is nothing between them.

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

Number Rack, by MLC holds the better App Store score, 3.2 against 1.0. That said, the two scores are not equally well evidenced: Number Rack, by MLC has 9 ratings behind it against 1, so its average is the more settled of the two.

Number Rack, by MLC ships an update every 25 months, Owlet every 6 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Number Rack, by MLC | Owlet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (9 ratings)](https://appshunter.io/ios/app/number-rack-by-mlc/id1469094747/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/owlet-cube3/id1533414683/reviews) |
| Number of ratings | **9** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 6 months** |
| Monetization | Free | — |
| Size | 4 MB | 123 MB |
| Requires iOS | 14.7 | **12.0** |
| Devices | iPad | **iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [The Math Learning Center](https://appshunter.io/developer/1542700905) | [BirdBrain Technologies LLC](https://appshunter.io/developer/1012525349) |

## 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


### Owlet

[App page](https://appshunter.io/ios/app/owlet-cube3/id1533414683)

**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 Owlet free?

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

### Which has better reviews, Number Rack, by MLC or Owlet?

Number Rack, by MLC is rated higher. Number Rack, by MLC averages 3.2 out of 5 from 9 ratings, while Owlet averages 1.0 from 1 ratings.

### Do Number Rack, by MLC or Owlet have ads?

Neither Number Rack, by MLC nor Owlet shows ads.

### Which is updated more often, Number Rack, by MLC or Owlet?

Number Rack, by MLC ships an update every 25 months, and Owlet every 6 months. Most recently, Number Rack, by MLC was updated on October 24, 2026 and Owlet 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.*