# iCTF vs ControlsLab

The clearest difference is price: ControlsLab at Free against iCTF's $3.99. iCTF's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 18.5). On ads and device support there is nothing between them.

ControlsLab is free to download; iCTF costs $3.99 up front. ControlsLab sells 1 one-off in-app purchase. iCTF asks for nothing beyond the download.

## The numbers

| Metric | iCTF | ControlsLab |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/controlslab/id6763078520/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | — | Free with in-app purchases |
| Size | 24 MB | 1 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jeremy Laratro](https://appshunter.io/developer/1864044207) | [Pedro Resto](https://appshunter.io/developer/1895152088) |

## What reviewers say

### iCTF

[App page](https://appshunter.io/ios/app/ictf/id6756991047)

**Features:** macOS Compatibility

**In-app purchases:** none


### ControlsLab

[App page](https://appshunter.io/ios/app/controlslab/id6763078520)

This app offers a professional-grade simulator for system dynamics and control systems. It allows users to visualize and interact with mass-spring-damper systems and control loops without coding. Explore parameters, inputs, and analysis modes with real-time visual feedback.

**Highlights:** Real-time system simulation, Parameter adjustment with sliders, Live time-domain response plot, S-plane pole visualization, Open-loop and closed-loop modes, PID controller tuning, Bode plot analysis

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ControlsLab Pro | $4.99 | one-time |


## Frequently asked questions

### Is iCTF free?

iCTF costs $3.99, with no in-app purchases.

### Is ControlsLab free?

ControlsLab is free to download, with in-app purchases available.

### Do iCTF or ControlsLab have ads?

Neither iCTF nor ControlsLab shows ads.

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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.*