# Circuitry vs Engineering & FE Prep

The clearest difference is rating: Engineering & FE Prep at 4.5 against Circuitry's 3.9. Engineering & FE Prep also leads on update cadence (every 2 weeks vs every 4 months) and review sentiment (62% vs 51%). Circuitry's advantage is in-app purchases (none vs 1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Engineering & FE Prep sells 1 one-off in-app purchase. Circuitry asks for nothing beyond the download.

Engineering & FE Prep holds the better App Store score, 4.5 against 3.9. Both are backed by a comparable volume of ratings — 155 and 171 respectively. Written reviews point the same way: 51% of Circuitry's written reviews are positive against 62% of Engineering & FE Prep's.

Circuitry ships an update every 4 months, Engineering & FE Prep every 2 weeks. The most recent releases landed on September 25, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Circuitry | Engineering & FE Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (155 ratings)](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898/reviews) | **[4.5 (171 ratings)](https://appshunter.io/ios/app/engineering-and-fe-prep/id1519694401/reviews)** |
| Number of ratings | 155 | **171** |
| Positive reviews | 51.4% of reviews | **61.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 35 MB | 102 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Raffael Kaehn](https://appshunter.io/developer/1234032836) | [EnginPeers LLC](https://appshunter.io/developer/1368846655) |

## What reviewers say

### Circuitry

[App page](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898)

Build and simulate electronic circuits in an intuitive 3D environment. This app offers lightning-fast analysis and a user-friendly interface, making complex engineering accessible. Circuits are saved as documents for easy sharing and management across devices.

**Highlights:** 3D circuit building, GPU-accelerated analysis, Intuitive 3D interface, Document-based circuit files, Component placement and connection, Resistor, voltage source, light bulb components

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Cool game idea
- 👍 Nice and 3D interface
- 🚀 Easy to use and perfect 3D
- 👍 Fun and simple
- 👍 Beautifully visual and interactive

**What reviewers complain about**

- 😞 Missing many components
- 😞 Limited functionality
- 😞 Not useful for professional work
- 😞 Inaccurate electrical simulation
- 😞 App is broken/crashes

**Reported bugs**

- App crashes on launch
- App doesn't work after download
- Blank white screen on opening
- App won't open, only shows a folder
- Lights won't turn on

**Requested features**

- Add more components (diodes, transistors, capacitors, inductors, speakers, microphones, resistors, switches, LEDs, displays, transformers)
- Add labels/names for components
- Add intensity and voltage for cables
- Add undo/redo buttons
- Add tutorials or guidance videos


### Engineering & FE Prep

[App page](https://appshunter.io/ios/app/engineering-and-fe-prep/id1519694401)

Prepare for your Fundamentals of Engineering (FE) exam with this comprehensive study tool. Review key engineering topics, practice with quizzes and exams, and analyze your performance to identify areas for improvement. Tailored for various engineering disciplines, it offers on-the-go learning to help you pass with confidence.

**Highlights:** 10+ Engineering topics reviewed, Practice exams, Test analysis with score and missed questions, Flashcards, Review over 15+ Engineering topics and quizzes

**Features:** macOS Compatibility

**In-app purchases (1)**

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


## Frequently asked questions

### Is Circuitry free?

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

### Is Engineering & FE Prep free?

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

### Which has better reviews, Circuitry or Engineering & FE Prep?

Engineering & FE Prep is rated higher. Circuitry averages 3.9 out of 5 from 155 ratings, while Engineering & FE Prep averages 4.5 from 171 ratings.

### Do Circuitry or Engineering & FE Prep have ads?

Neither Circuitry nor Engineering & FE Prep shows ads.

### Which is updated more often, Circuitry or Engineering & FE Prep?

Circuitry ships an update every 4 months, and Engineering & FE Prep every 2 weeks. Most recently, Circuitry was updated on September 25, 2026 and Engineering & FE Prep on September 15, 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.*