# Pearl Diver HD vs First Grade Math Challenge

The clearest difference is rating: First Grade Math Challenge at 4.0 against Pearl Diver HD's 1.5. First Grade Math Challenge also leads on update cadence (every 2 months vs every 20 months) and review sentiment (80% vs 71%). Pearl Diver HD's advantage is monetization model (free vs free with in-app purchases). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

First Grade Math Challenge holds the better App Store score, 4.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 71% of Pearl Diver HD's written reviews are positive against 80% of First Grade Math Challenge's.

Pearl Diver HD ships an update every 20 months, First Grade Math Challenge every 2 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | Pearl Diver HD | First Grade Math Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/pearl-diver-hd/id364617763/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/first-grade-math-challenge/id571805524/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 71.4% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 41 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [New Mexico State University Board of Regents](https://appshunter.io/developer/337567846) | [Eric Marschner](https://appshunter.io/developer/319178159) |

## What reviewers say

### Pearl Diver HD

[App page](https://appshunter.io/ios/app/pearl-diver-hd/id364617763)

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

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

**Features:** macOS Compatibility

**In-app purchases:** none


### First Grade Math Challenge

[App page](https://appshunter.io/ios/app/first-grade-math-challenge/id571805524)

Practice addition and subtraction skills with a barnyard theme. Collect and learn about animals by completing timed math challenges, unlocking fun facts and sounds. An in-app upgrade offers more levels and animals permanently.

**Highlights:** Addition & Subtraction practice, Barnyard animal collection, Timed math challenges, Learn animal facts, Animal sounds, Gradually increasing difficulty

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pearl Diver HD free?

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

### Is First Grade Math Challenge free?

First Grade Math Challenge is free to download, with no in-app purchases.

### Which has better reviews, Pearl Diver HD or First Grade Math Challenge?

First Grade Math Challenge is rated higher. Pearl Diver HD averages 1.5 out of 5 from 2 ratings, while First Grade Math Challenge averages 4.0 from 4 ratings.

### Do Pearl Diver HD or First Grade Math Challenge have ads?

Neither Pearl Diver HD nor First Grade Math Challenge shows ads.

### Which is updated more often, Pearl Diver HD or First Grade Math Challenge?

Pearl Diver HD ships an update every 20 months, and First Grade Math Challenge every 2 months. Most recently, Pearl Diver HD was updated on November 1, 2026 and First Grade Math Challenge on November 1, 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.*