iTurbo vs SWEapp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iTurbo
This app simulates fluid dynamics by solving Navier-Stokes equations for 2D incompressible turbulence. It uses a direct numerical simulation method with Euler time stepping and Fourier space calculations for efficiency.
- Direct Numerical Simulation (DNS)
- Navier-Stokes equation solver
- 2D incompressible turbulence
- Euler time stepping
- Fourier space calculations
- Vorticity field transformation
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This application performs a Direct Numerical Simulation (DNS) where the Navier-Stokes equations are solved for two dimensional incompressible homogeneous turbulence. These equations are a set of nonlinear partial differential equations. The time stepping is performed with a simple Euler method where the time step is calculated so that the CFL number does not exceeds the given number (should be less than 0.8 otherwise the simulation blows up). The equations are solved in the Fourier space where the calculation of the nonlinear term transforms to a simple multiplication. The main CPU usage is consumed by transforming the vorticity field back and fourth between the Normal space where the time-stepping is performed and the Fourier space where the nonlinear term is calculated.
SWEapp
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Shallow water equations are the set of equations to describe surface water flow. This app demonstrates the behavior of one-dimensional shallow water flow visually by solving the shallow water equations.
Screenshots
Verdict
The clearest difference is update cadence: SWEapp at every 4 months against iTurbo's every 54 months. SWEapp also leads on iOS requirement (11.0 vs 18.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
iTurbo ships an update every 54 months, SWEapp every 4 months. The most recent releases landed on June 24, 2026 and September 9, 2026 respectively.
| Parameter | iTurbo | SWEapp |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 54 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Torbjorn Sjogren | Ryota Tsubaki |
In-app purchases
iTurbo
No in-app purchases
SWEapp
No in-app purchases
