# Third Grade Math Trainer vs DrPhos' Chemistry Pro

The clearest difference is update cadence: DrPhos' Chemistry Pro at every 9 days against Third Grade Math Trainer's every 26 months. Third Grade Math Trainer's advantage is price ($2.99 vs $4.99) and iOS requirement (12.0 vs 17.2). On ads, in-app purchases and device support there is nothing between them.

Third Grade Math Trainer costs $2.99 and DrPhos' Chemistry Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Third Grade Math Trainer ships an update every 26 months, DrPhos' Chemistry Pro every 9 days. The most recent releases landed on September 9, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Third Grade Math Trainer | DrPhos' Chemistry Pro |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/drphos-chemistry-pro/id6477353606/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 9 days** |
| Monetization | — | Paid |
| Size | 19 MB | 19 MB |
| Requires iOS | **12.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Malugin](https://appshunter.io/developer/562782409) | [Monte L Helm](https://appshunter.io/developer/1715082616) |

## What reviewers say

### Third Grade Math Trainer

[App page](https://appshunter.io/ios/app/third-grade-math-trainer/id1312646293)

**Features:** macOS Compatibility

**In-app purchases:** none


### DrPhos' Chemistry Pro

[App page](https://appshunter.io/ios/app/drphos-chemistry-pro/id6477353606)

This comprehensive chemistry toolkit simplifies complex calculations and problem-solving for students. It offers tools for stoichiometry, pH, molar mass, and balancing chemical equations, making it ideal for high school and college-level chemistry.

**Highlights:** Science Calculator with sig fig control, Molar Mass Calculator, Equation Balancer, Stoichiometry Solver, pH Calculator, Offline Support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Third Grade Math Trainer free?

Third Grade Math Trainer costs $2.99, with no in-app purchases.

### Is DrPhos' Chemistry Pro free?

DrPhos' Chemistry Pro costs $4.99, with no in-app purchases.

### Do Third Grade Math Trainer or DrPhos' Chemistry Pro have ads?

Neither Third Grade Math Trainer nor DrPhos' Chemistry Pro shows ads.

### Which is updated more often, Third Grade Math Trainer or DrPhos' Chemistry Pro?

Third Grade Math Trainer ships an update every 26 months, and DrPhos' Chemistry Pro every 9 days. Most recently, Third Grade Math Trainer was updated on September 9, 2026 and DrPhos' Chemistry Pro on September 11, 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.*