# Darth Vaper vs Smart Logic Simulator

The clearest difference is review sentiment: Smart Logic Simulator at 50% against Darth Vaper's 0%. Darth Vaper's advantage is in-app purchases (none vs 1) and update cadence (every 11 days vs every 2 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Smart Logic Simulator sells 1 one-off in-app purchase. Darth Vaper asks for nothing beyond the download.

Darth Vaper ships an update every 11 days, Smart Logic Simulator every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Darth Vaper | Smart Logic Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/smart-logic-simulator/id6742043778/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 142 MB | 59 MB |
| Requires iOS | **11.0** | 15.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cheryl Montgomery](https://appshunter.io/developer/611176285) | [Tomasz Czart](https://appshunter.io/developer/1796528140) |

## What reviewers say

### Darth Vaper

[App page](https://appshunter.io/ios/app/darth-vaper/id1458794050)

This augmented reality application visually demonstrates the harmful effects of smoking and vaping on your lungs. By using a marker, users can compare a healthy lung to one affected by these habits.

**Highlights:** Augmented reality visualization, Comparison of healthy vs. affected lungs, Educational tool for health risks, Marker-based AR experience, Link to marker provided within app

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Logic Simulator

[App page](https://appshunter.io/ios/app/smart-logic-simulator/id6742043778)

Design and simulate digital circuits using a drag-and-drop interface. Experiment with various logic gates, flip-flops, and arithmetic circuits to build complex systems. Ideal for students and hobbyists interested in electronics.

**Highlights:** Drag-and-drop circuit design, Logic gate simulation, Integrated circuit design, Flip-flops and latches, Multiplexers and demultiplexers, Arithmetic circuit design

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One-time fee | $29.99 | one-time |


## Frequently asked questions

### Is Darth Vaper free?

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

### Is Smart Logic Simulator free?

Smart Logic Simulator is free to download, with in-app purchases available.

### Do Darth Vaper or Smart Logic Simulator have ads?

Neither Darth Vaper nor Smart Logic Simulator shows ads.

### Which is updated more often, Darth Vaper or Smart Logic Simulator?

Darth Vaper ships an update every 11 days, and Smart Logic Simulator every 2 months. Most recently, Darth Vaper was updated on October 24, 2026 and Smart Logic Simulator on October 24, 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.*