# Eng Fluids vs Mechanical FE Prep

The clearest difference is in-app purchases: Eng Fluids at none against Mechanical FE Prep's 1. Eng Fluids also leads on iOS requirement (9.0 vs 12.0). Mechanical FE Prep's advantage is update cadence (every 5 days vs every 13 months). On price, ads and device support there is nothing between them.

Both are free to download. Mechanical FE Prep sells 1 one-off in-app purchase. Eng Fluids asks for nothing beyond the download.

Eng Fluids ships an update every 13 months, Mechanical FE Prep every 5 days. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Eng Fluids | Mechanical FE Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/mechanical-fe-prep/id1585519077/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 21 MB | 67 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kurt Gramoll](https://appshunter.io/developer/782218116) | [EnginPeers LLC](https://appshunter.io/developer/1368846655) |

## What reviewers say

### Eng Fluids

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Mechanical FE Prep

[App page](https://appshunter.io/ios/app/mechanical-fe-prep/id1585519077)

Prepare for Mechanical Engineering courses and the Fundamentals of Engineering exam with this comprehensive mobile study tool. Access over 15 engineering topics, practice exams, and detailed test analysis to master the material and pass with confidence.

**Highlights:** 15+ Engineering topics, Practice exams, Test analysis, Flashcards, Subject review, Exam prep

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | one-time |


## Frequently asked questions

### Is Eng Fluids free?

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

### Is Mechanical FE Prep free?

Mechanical FE Prep is free to download, with in-app purchases available.

### Do Eng Fluids or Mechanical FE Prep have ads?

Neither Eng Fluids nor Mechanical FE Prep shows ads.

### Which is updated more often, Eng Fluids or Mechanical FE Prep?

Eng Fluids ships an update every 13 months, and Mechanical FE Prep every 5 days. Most recently, Eng Fluids was updated on October 27, 2026 and Mechanical FE Prep on October 30, 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.*