# AeroEngineS vs Eng Fluids

The clearest difference is update cadence: AeroEngineS at every 3 days against Eng Fluids's every 13 months. Eng Fluids's advantage is iOS requirement (9.0 vs 14.0). 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.

AeroEngineS ships an update every 3 days, Eng Fluids every 13 months. The most recent releases landed on June 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | AeroEngineS | Eng Fluids |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aeroengines/id1451710013/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 13 months |
| Monetization | Free | — |
| Size | 7 MB | 21 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aristotle University of Thessaloniki](https://appshunter.io/developer/542325073) | [Kurt Gramoll](https://appshunter.io/developer/782218116) |

## What reviewers say

### AeroEngineS

[App page](https://appshunter.io/ios/app/aeroengines/id1451710013)

This app simulates the thermodynamic cycles and performance of various aircraft and rocket engines. It calculates key parameters like thrust, mass flow, and emissions, and can predict compressor map operating points.

**Highlights:** Turbojet and turbofan engine simulation, Rocket engine cycle analysis, Ramjet engine simulation, Emissions calculation, Compressor map prediction, Thermodynamic cycle analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### Eng Fluids

[App page](https://appshunter.io/ios/app/eng-fluids/id1540624295)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AeroEngineS free?

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

### Is Eng Fluids free?

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

### Do AeroEngineS or Eng Fluids have ads?

Neither AeroEngineS nor Eng Fluids shows ads.

### Which is updated more often, AeroEngineS or Eng Fluids?

AeroEngineS ships an update every 3 days, and Eng Fluids every 13 months. Most recently, AeroEngineS was updated on June 24, 2026 and Eng Fluids on September 21, 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.*