# Physics! Fun vs Kselebox

The clearest difference is rating: Physics! Fun at 4.8 against Kselebox's 3.6. Physics! Fun also leads on review sentiment (100% vs 70%). Kselebox's advantage is in-app purchases (none vs 5) and iOS requirement (13.0 vs 16). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Physics! Fun sells 5 in-app purchases, starting at $4.99 per month. Kselebox asks for nothing beyond the download.

Physics! Fun holds the better App Store score, 4.8 against 3.6. Both are backed by a comparable volume of ratings — 6 and 11 respectively. Written reviews point the same way: 100% of Physics! Fun's written reviews are positive against 70% of Kselebox's.

Physics! Fun ships an update every 2 weeks, Kselebox fortnightly. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Physics! Fun | Kselebox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/physics-fun/id6752563347/reviews)** | [3.6 (11 ratings)](https://appshunter.io/ios/app/kselebox/id6754511218/reviews) |
| Number of ratings | 6 | **11** |
| Positive reviews | **100.0% of reviews** | 70.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 71 MB | 313 MB |
| Requires iOS | 16 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 9+ |
| Developer | [Ramazan Saglam](https://appshunter.io/developer/1839886393) | [Vladyslav Ursatii](https://appshunter.io/developer/1866249197) |

## What reviewers say

### Physics! Fun

[App page](https://appshunter.io/ios/app/physics-fun/id6752563347)

Explore a realistic physics sandbox where you can build, break, and experiment with your own creations. Design complex machines, test structures, and manipulate gravity in an open-world environment. Frequent updates ensure endless creative possibilities.

**Highlights:** Realistic ragdoll physics, Dynamic particle and fluid simulations, Complex machine and structure building, Customizable gravity and environments, Intuitive building controls, Frequent content updates

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $4.99 | per month |
| Plus Yearly | $29.99 | per year |
| Small Block Package | $1.99 | one-time |
| Medium Block Package | $2.49 | one-time |
| Large Block Package | $2.99 | one-time |


### Kselebox

[App page](https://appshunter.io/ios/app/kselebox/id6754511218)

A 2D physics sandbox game focused on creativity and building. Design machines, create environments, and experiment with natural interactions in a relaxed atmosphere. It's about freedom and the joy of crafting unique worlds.

**Highlights:** 2D physics sandbox gameplay, Creative building and design, Natural object interactions, Sandbox mode for freeform creation, Relaxed and calm atmosphere

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

**In-app purchases:** none


## Frequently asked questions

### Is Physics! Fun free?

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

### Is Kselebox free?

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

### Which has better reviews, Physics! Fun or Kselebox?

Physics! Fun is rated higher. Physics! Fun averages 4.8 out of 5 from 6 ratings, while Kselebox averages 3.6 from 11 ratings.

### Do Physics! Fun or Kselebox have ads?

Both Physics! Fun and Kselebox show ads.

### Which is updated more often, Physics! Fun or Kselebox?

Physics! Fun ships an update every 2 weeks, and Kselebox fortnightly. Most recently, Physics! Fun was updated on September 22, 2026 and Kselebox on September 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*