# Physics Master vs Relatively Simple

The clearest difference is review sentiment: Relatively Simple at 100% against Physics Master's 50%. Relatively Simple also leads on rating (5.0 vs 2.0) and in-app purchases (none vs 11). On price, update cadence and device support there is nothing between them.

Both are free to download. Physics Master sells 11 in-app purchases, starting at $0.99 per month. Relatively Simple asks for nothing beyond the download.

Relatively Simple holds the better App Store score, 5.0 against 2.0. That said, the two scores are not equally well evidenced: Relatively Simple has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Physics Master's written reviews are positive against 100% of Relatively Simple's.

Physics Master ships an update every 6 weeks, Relatively Simple monthly. The most recent releases landed on June 1, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Physics Master | Relatively Simple |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/physics-master/id1457499638/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/relatively-simple/id1464624768/reviews)** |
| Number of ratings | 1 | **7** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 86 MB | 434 MB |
| Requires iOS | 17.6 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Optimization Lab LLC](https://appshunter.io/developer/1082932084) | [Ira Rothstein](https://appshunter.io/developer/1464624767) |

## What reviewers say

### Physics Master

[App page](https://appshunter.io/ios/app/physics-master/id1457499638)

This app aids high school and undergraduate students in learning physics. It offers key concepts, formulas, practice questions with solutions, tutorial videos, and simulations to enhance understanding and problem-solving skills.

**Highlights:** Key physics concepts and formulas, Practice and challenge question solutions, Tutorial videos, Quiz questions with feedback, Physical process simulations, Progress tracking

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Level Monthly | $0.99 | per month |
| Pro Plus Level Monthly | $1.99 | per month |
| Pro Level Yearly | $7.99 | per year |
| Super Plus Monthly | $9.99 | per month |
| 100 Reward Points | $0.99 | one-time |
| 200 + Bonus 10 Reward Points | $1.99 | one-time |
| 300 + Bonus 20 Reward Points | $2.99 | one-time |
| 400 + Bonus 30 Reward Points | $3.99 | one-time |
| 500 + Bonus 40 Reward Points | $4.99 | one-time |
| 600 + Bonus 50 Reward Points | $5.99 | one-time |
| 1000 + Bonus 100 Reward Points | $9.99 | one-time |


### Relatively Simple

[App page](https://appshunter.io/ios/app/relatively-simple/id1464624768)

This app offers an experiential explanation of Einstein's theory of Special Relativity. Designed by a Carnegie Mellon University professor, it breaks down complex concepts like spacetime and E=mc^2 for a general audience.

**Highlights:** Experiential learning approach, Explains Special Relativity, Demystifies complex physics concepts, Designed by university professor, Accessible for general audience

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Physics Master free?

Physics Master is free to download, with in-app purchases available.

### Is Relatively Simple free?

Relatively Simple is free to download, with no in-app purchases.

### Which has better reviews, Physics Master or Relatively Simple?

Relatively Simple is rated higher. Physics Master averages 2.0 out of 5 from 1 ratings, while Relatively Simple averages 5.0 from 7 ratings.

### Do Physics Master or Relatively Simple have ads?

Physics Master shows ads; Relatively Simple does not.

### Which is updated more often, Physics Master or Relatively Simple?

Physics Master ships an update every 6 weeks, and Relatively Simple monthly. Most recently, Physics Master was updated on June 1, 2026 and Relatively Simple on September 19, 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.*