# PhET Simulations vs Num Trainer

The clearest difference is price: Num Trainer at Free against PhET Simulations's $0.99. Num Trainer also leads on review sentiment (100% vs 66%) and rating (5.0 vs 4.5). PhET Simulations's advantage is ratings volume (48 vs 2) and chart position (#37 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Num Trainer is free to download; PhET Simulations costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Num Trainer holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: PhET Simulations has 48 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 66% of PhET Simulations's written reviews are positive against 100% of Num Trainer's.

PhET Simulations ships an update every 14 months, Num Trainer monthly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | PhET Simulations | Num Trainer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.5 (48 ratings)](https://appshunter.io/ios/app/phet-simulations/id1134126831/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/num-trainer-brain-training/id1531055741/reviews)** |
| Number of ratings | **48** | 2 |
| Positive reviews | 65.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Monthly** |
| Monetization | Paid | **Free** |
| Best chart rank | **#37** | — |
| Size | 125 MB | 2 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [University of Colorado Boulder](https://appshunter.io/developer/972210292) | [Yang Wang](https://appshunter.io/developer/1531055743) |

## What reviewers say

### PhET Simulations

[App page](https://appshunter.io/ios/app/phet-simulations/id1134126831)

**Currently charting:** #37 Top Paid · Education (US App Store)

Explore science and math concepts through interactive simulations. This app provides over 75 HTML5 simulations for learning about atoms, energy, multiplication, and more. It's ideal for students, parents, and educators, offering offline access and multiple language support.

**Highlights:** Interactive science and math simulations, Offline play capability, Multiple language support, Customizable favorites collection, Automatic simulation updates, Easy simulation sorting

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

**In-app purchases:** none


### Num Trainer

[App page](https://appshunter.io/ios/app/num-trainer-brain-training/id1531055741)

This app offers quick, engaging number-based exercises to sharpen your mind. Improve focus, memory, and mental math skills with short training sessions that can be adjusted for difficulty.

**Highlights:** Improve reflection and focus, Enhance attention and memory, Develop mental math skills, Boost logic abilities, Multiple training modes, Adjustable difficulty levels

**In-app purchases:** none


## Frequently asked questions

### Is PhET Simulations free?

PhET Simulations costs $0.99, with no in-app purchases.

### Is Num Trainer free?

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

### Which has better reviews, PhET Simulations or Num Trainer?

Num Trainer is rated higher. PhET Simulations averages 4.5 out of 5 from 48 ratings, while Num Trainer averages 5.0 from 2 ratings.

### Do PhET Simulations or Num Trainer have ads?

Neither PhET Simulations nor Num Trainer shows ads.

### Which is updated more often, PhET Simulations or Num Trainer?

PhET Simulations ships an update every 14 months, and Num Trainer monthly. Most recently, PhET Simulations was updated on October 26, 2026 and Num Trainer on October 27, 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.*