# Double Pendulum Simulation vs Federgraph

The clearest difference is update cadence: Federgraph at every 15 months against Double Pendulum Simulation's every 73 months. Double Pendulum Simulation's advantage is iOS requirement (7.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Double Pendulum Simulation ships an update every 73 months, Federgraph every 15 months. The most recent releases landed on October 23, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Double Pendulum Simulation | Federgraph |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/double-pendulum-simulation/id370962405/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 73 months | **Every 15 months** |
| Monetization | Free | — |
| Size | 0 MB | 29 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ManneTroll Solutions](https://appshunter.io/developer/313743954) | [Gustav Schubert](https://appshunter.io/developer/670940970) |

## What reviewers say

### Double Pendulum Simulation

[App page](https://appshunter.io/ios/app/double-pendulum-simulation/id370962405)

Explore the chaotic and dynamic behavior of a double pendulum. This app uses the Runge-Kutta method to solve differential equations, allowing you to influence the pendulum's motion by tilting your device.

**Highlights:** Double pendulum simulation, Runge-Kutta method solver, Chaotic dynamics exploration, Device tilt interaction, Educational physics tool

**Features:** macOS Compatibility

**In-app purchases:** none


### Federgraph

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

**In-app purchases:** none


## Frequently asked questions

### Is Double Pendulum Simulation free?

Double Pendulum Simulation is free to download, with no in-app purchases.

### Is Federgraph free?

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

### Do Double Pendulum Simulation or Federgraph have ads?

Neither Double Pendulum Simulation nor Federgraph shows ads.

### Which is updated more often, Double Pendulum Simulation or Federgraph?

Double Pendulum Simulation ships an update every 73 months, and Federgraph every 15 months. Most recently, Double Pendulum Simulation was updated on October 23, 2026 and Federgraph on October 12, 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.*