Double Pendulum Simulation vs Learn Fortran Programming PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Double Pendulum Simulation
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.
- Double pendulum simulation
- Runge-Kutta method solver
- Chaotic dynamics exploration
- Device tilt interaction
- Educational physics tool
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In mathematics, in the area of dynamical systems, a double pendulum is a pendulum with another pendulum attached to its end, and is a simple physical system that exhibits rich dynamic behavior. The motion of a double pendulum is governed by a set of coupled ordinary differential equations. For certain energies its motion is chaotic. This application solves these differential equations using the Runge-Kutta method for the time stepping. You can influence the movement of the pendulum by holding your device in different positions.
Learn Fortran Programming PRO
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Master Fortran: The High-Performance Language for Scientific Computing Unlock the power of Fortran (FORmula TRANslation), the venerable and actively-developed programming language that remains the dominant choice for High-Performance Computing (HPC), scientific simulations, and engineering applications. Learn Fortran App is a comprehensive, structured course designed to take you from a programming novice to a confident Fortran developer, focusing on modern features like parallel computing, array-oriented programming, and object-oriented capabilities.
Screenshots
Verdict
The clearest difference is price: Double Pendulum Simulation at Free against Learn Fortran Programming PRO's $1.99. Double Pendulum Simulation also leads on iOS requirement (7.0 vs 13.0). Learn Fortran Programming PRO's advantage is update cadence (every 10 months vs every 73 months). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Double Pendulum Simulation is free to download; Learn Fortran Programming PRO costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Double Pendulum Simulation ships an update every 73 months, Learn Fortran Programming PRO every 10 months. The most recent releases landed on October 23, 2026 and October 8, 2026 respectively.
| Parameter | Double Pendulum Simulation | Learn Fortran Programming PRO |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.0 (2 ratings) — better | — |
| Positive reviews | 37.5% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 73 months | Every 10 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 7.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 0 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | ManneTroll Solutions | Muhammad Mubeen |
In-app purchases
Double Pendulum Simulation
No in-app purchases
Learn Fortran Programming PRO
No in-app purchases
Questions
Is Double Pendulum Simulation free?
Is Learn Fortran Programming PRO free?
Do Double Pendulum Simulation or Learn Fortran Programming PRO have ads?
Which is updated more often, Double Pendulum Simulation or Learn Fortran Programming PRO?
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