# Pearl Diver HD vs Tri This Math

The clearest difference is update cadence: Tri This Math at every 3 months against Pearl Diver HD's every 20 months. Tri This Math also leads on iOS requirement (10.0 vs 17.6). 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.

Pearl Diver HD ships an update every 20 months, Tri This Math every 3 months. The most recent releases landed on October 17, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Pearl Diver HD | Tri This Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/pearl-diver-hd/id364617763/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 28 MB | 36 MB |
| Requires iOS | 17.6 | **10.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [New Mexico State University Board of Regents](https://appshunter.io/developer/337567846) | [Classroom Focused Software](https://appshunter.io/developer/406741679) |

## 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


### Tri This Math

[App page](https://appshunter.io/ios/app/tri-this-math/id1406150893)

**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 Tri This Math free?

Tri This Math is free to download, with no in-app purchases.

### Do Pearl Diver HD or Tri This Math have ads?

Neither Pearl Diver HD nor Tri This Math shows ads.

### Which is updated more often, Pearl Diver HD or Tri This Math?

Pearl Diver HD ships an update every 20 months, and Tri This Math every 3 months. Most recently, Pearl Diver HD was updated on October 17, 2026 and Tri This Math 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.*