# PE.Mech vs 3DPhyS

The clearest difference is price: 3DPhyS at Free against PE.Mech's $0.99. 3DPhyS also leads on update cadence (fortnightly vs every 2 months) and device support (3 vs 1). PE.Mech's advantage is ads (none vs shown). On in-app purchases there is nothing between them.

3DPhyS is free to download; PE.Mech costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PE.Mech ships an update every 2 months, 3DPhyS fortnightly. The most recent releases landed on September 30, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | PE.Mech | 3DPhyS |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Ad-supported |
| Size | 35 MB | 176 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [巍 顾](https://appshunter.io/developer/1368599824) | [Sota Takasugi](https://appshunter.io/developer/1713502017) |

## What reviewers say

### PE.Mech

[App page](https://appshunter.io/ios/app/pemech/id1368599825)

**Features:** macOS Compatibility

**In-app purchases:** none


### 3DPhyS

[App page](https://appshunter.io/ios/app/3dphys-physics-simulator/id6470351815)

Explore fundamental physics concepts through interactive simulations. Adjust parameters like initial velocity and bounce coefficient to understand phenomena like free fall, projectile motion, and circular motion. This app supports learning in multiple languages.

**Highlights:** Interactive physics simulations, Adjustable experiment parameters, Multiple physics experiment modules, Multilingual interface, Free to download and use

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PE.Mech free?

PE.Mech costs $0.99, with no in-app purchases.

### Is 3DPhyS free?

3DPhyS is free to download, with no in-app purchases.

### Do PE.Mech or 3DPhyS have ads?

3DPhyS shows ads; PE.Mech does not.

### Which is updated more often, PE.Mech or 3DPhyS?

PE.Mech ships an update every 2 months, and 3DPhyS fortnightly. Most recently, PE.Mech was updated on September 30, 2026 and 3DPhyS on October 4, 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.*