# iTurbo vs PocketFlow

The clearest difference is in-app purchases: iTurbo at none against PocketFlow's 2. PocketFlow's advantage is update cadence (weekly vs every 54 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PocketFlow sells 2 one-off in-app purchases. iTurbo asks for nothing beyond the download.

iTurbo ships an update every 54 months, PocketFlow weekly. The most recent releases landed on October 31, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | iTurbo | PocketFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iturbo/id314368331/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 54 months | **Weekly** |
| Monetization | Free | — |
| Size | 2 MB | 79 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ManneTroll Solutions](https://appshunter.io/developer/313743954) | [Aqua Axolotl Analytics](https://appshunter.io/developer/1828911252) |

## 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


### PocketFlow

[App page](https://appshunter.io/ios/app/pocketflow-water-simulator/id6749147689)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7-Day Trial | Free | one-time |
| Unlock PocketFlow | $9.99 | one-time |


## Frequently asked questions

### Is iTurbo free?

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

### Is PocketFlow free?

PocketFlow is free to download, with in-app purchases available.

### Do iTurbo or PocketFlow have ads?

Neither iTurbo nor PocketFlow shows ads.

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

iTurbo ships an update every 54 months, and PocketFlow weekly. Most recently, iTurbo was updated on October 31, 2026 and PocketFlow on November 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.*