# iTurbo vs SWEapp

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.

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 September 29, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | iTurbo | SWEapp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iturbo/id314368331/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 54 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 2 MB | 17 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ManneTroll Solutions](https://appshunter.io/developer/313743954) | [Ryota Tsubaki](https://appshunter.io/developer/981387742) |

## What reviewers say

### iTurbo

[App page](https://appshunter.io/ios/app/iturbo/id314368331)

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.

**Highlights:** Direct Numerical Simulation (DNS), Navier-Stokes equation solver, 2D incompressible turbulence, Euler time stepping, Fourier space calculations, Vorticity field transformation

**Features:** macOS Compatibility

**In-app purchases:** none


### SWEapp

[App page](https://appshunter.io/ios/app/sweapp/id1530931309)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iTurbo free?

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

### Is SWEapp free?

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

### Do iTurbo or SWEapp have ads?

Neither iTurbo nor SWEapp shows ads.

### Which is updated more often, iTurbo or SWEapp?

iTurbo ships an update every 54 months, and SWEapp every 4 months. Most recently, iTurbo was updated on September 29, 2026 and SWEapp 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.*