# Federgraph vs PhET Simulations

The clearest difference is price: Federgraph at Free against PhET Simulations's $0.99. PhET Simulations's advantage is chart position (#28 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

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

Federgraph ships an update every 15 months, PhET Simulations every 14 months. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Federgraph | PhET Simulations |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[4.5 (49 ratings)](https://appshunter.io/ios/app/phet-simulations/id1134126831/reviews)** |
| Number of ratings | — | **49** |
| Positive reviews | — | 65.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 14 months** |
| Monetization | — | Paid |
| Best chart rank | — | **#28** |
| Size | 29 MB | 125 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gustav Schubert](https://appshunter.io/developer/670940970) | [University of Colorado Boulder](https://appshunter.io/developer/972210292) |

## What reviewers say

### Federgraph

[App page](https://appshunter.io/ios/app/federgraph/id670940947)

**In-app purchases:** none


### PhET Simulations

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

**Currently charting:** #28 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


## Frequently asked questions

### Is Federgraph free?

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

### Is PhET Simulations free?

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

### Do Federgraph or PhET Simulations have ads?

Neither Federgraph nor PhET Simulations shows ads.

### Which is updated more often, Federgraph or PhET Simulations?

Federgraph ships an update every 15 months, and PhET Simulations every 14 months. Most recently, Federgraph was updated on September 9, 2026 and PhET Simulations on September 23, 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.*