# Explain 3D FREE vs Circuitry

The clearest difference is rating: Circuitry at 3.9 against Explain 3D FREE's 2.0. Circuitry also leads on review sentiment (51% vs 14%) and ratings volume (156 vs 5). Explain 3D FREE's advantage is update cadence (every 6 weeks vs every 4 months) and iOS requirement (9.0 vs 12.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Circuitry holds the better App Store score, 3.9 against 2.0. That said, the two scores are not equally well evidenced: Circuitry has 156 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 14% of Explain 3D FREE's written reviews are positive against 51% of Circuitry's.

Explain 3D FREE ships an update every 6 weeks, Circuitry every 4 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Explain 3D FREE | Circuitry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (5 ratings)](https://appshunter.io/ios/app/explain-3d-free-understand-how-stuff-works/id968247111/reviews) | **[3.9 (156 ratings)](https://appshunter.io/ios/app/circuitry-3d-circuit-builder/id1476733898/reviews)** |
| Number of ratings | 5 | **156** |
| Positive reviews | 14.3% of reviews | **51.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 84 MB | 35 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Explain 3D](https://appshunter.io/developer/1019479194) | [Raffael Kaehn](https://appshunter.io/developer/1234032836) |

## What reviewers say

### Explain 3D FREE

[App page](https://appshunter.io/ios/app/explain-3d-free-understand-how-stuff-works/id968247111)

Explore interactive 3D simulations to understand how various systems and objects function. This free version includes a 4-stroke engine simulation, with more available in the full version. It aims to make learning engaging and fun through detailed models and animations.

**Highlights:** Interactive 3D simulations, Understand how things work, Car engine simulation (free), Detailed 3D models and animations, Engaging educational content, Intuitive interface

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Explain 3D FREE free?

Explain 3D FREE is free to download, with no in-app purchases.

### Is Circuitry free?

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

### Which has better reviews, Explain 3D FREE or Circuitry?

Circuitry is rated higher. Explain 3D FREE averages 2.0 out of 5 from 5 ratings, while Circuitry averages 3.9 from 156 ratings.

### Do Explain 3D FREE or Circuitry have ads?

Neither Explain 3D FREE nor Circuitry shows ads.

### Which is updated more often, Explain 3D FREE or Circuitry?

Explain 3D FREE ships an update every 6 weeks, and Circuitry every 4 months. Most recently, Explain 3D FREE was updated on November 1, 2026 and Circuitry on November 3, 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.*