# SISO Calculator vs ControlsLab

The clearest difference is in-app purchases: SISO Calculator at none against ControlsLab's 1. SISO Calculator also leads on iOS requirement (14.0 vs 18.5). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. ControlsLab sells 1 one-off in-app purchase. SISO Calculator asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SISO Calculator against 5.0 for ControlsLab. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

## The numbers

| Metric | SISO Calculator | ControlsLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/siso-calculator/id1548141101/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/controlslab/id6763078520/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 1 MB |
| Requires iOS | **14.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Deft Dynamics](https://appshunter.io/developer/1288783778) | [Pedro Resto](https://appshunter.io/developer/1895152088) |

## What reviewers say

### SISO Calculator

[App page](https://appshunter.io/ios/app/siso-calculator/id1548141101)

This app helps engineers and students understand System Dynamics and Controls. It offers an intuitive interface to quickly analyze controller and plant interactions in both time and frequency domains.

**Highlights:** System Dynamics analysis, Controls engineering, Intuitive interface, Time domain analysis, Frequency domain analysis, Controller interaction visualization

**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 SISO Calculator free?

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

### Is ControlsLab free?

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

### Which has better reviews, SISO Calculator or ControlsLab?

SISO Calculator and ControlsLab are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do SISO Calculator or ControlsLab have ads?

Neither SISO Calculator 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.*