# Pearl Diver vs Missing Numbers Minds

The clearest difference is in-app purchases: Pearl Diver at none against Missing Numbers Minds's 2. Pearl Diver also leads on iOS requirement (17.6 vs 26.1). Missing Numbers Minds's advantage is update cadence (every 5 months vs every 20 months). On price, ads and device support there is nothing between them.

Both are free to download. Missing Numbers Minds sells 2 one-off in-app purchases. Pearl Diver asks for nothing beyond the download.

Pearl Diver ships an update every 20 months, Missing Numbers Minds every 5 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Pearl Diver | Missing Numbers Minds |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pearl-diver-number-line-math/id337567843/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 76.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 5 months** |
| Monetization | Free | — |
| Size | 28 MB | 4 MB |
| Requires iOS | **17.6** | 26.1 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [New Mexico State University Board of Regents](https://appshunter.io/developer/337567846) | [Juan Fullana](https://appshunter.io/developer/692107580) |

## What reviewers say

### Pearl Diver

[App page](https://appshunter.io/ios/app/pearl-diver-number-line-math/id337567843)

Dive into the ocean to master the number line, including fractions and decimals, by collecting pearls. This educational game is designed by experts to align with Common Core standards for grades 3-8.

**Highlights:** Number line mastery, Fractions and decimals, Common Core alignment, Progress tracking, Educational game design

**Features:** macOS Compatibility

**In-app purchases:** none


### Missing Numbers Minds

[App page](https://appshunter.io/ios/app/missing-numbers-minds/id980949764)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation for maintenance. | $0.99 | one-time |
| Extra for develop and maintenance | $0.99 | one-time |


## Frequently asked questions

### Is Pearl Diver free?

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

### Is Missing Numbers Minds free?

Missing Numbers Minds is free to download, with in-app purchases available.

### Do Pearl Diver or Missing Numbers Minds have ads?

Neither Pearl Diver nor Missing Numbers Minds shows ads.

### Which is updated more often, Pearl Diver or Missing Numbers Minds?

Pearl Diver ships an update every 20 months, and Missing Numbers Minds every 5 months. Most recently, Pearl Diver was updated on November 1, 2026 and Missing Numbers Minds on October 26, 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.*