# PIDTuner vs Control System Calc

The clearest difference is price: Control System Calc at Free against PIDTuner's $0.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Control System Calc is free to download; PIDTuner costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | PIDTuner | Control System Calc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 1 MB | 6 MB |
| Requires iOS | 18.2 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Boykin Inc.](https://appshunter.io/developer/453157232) | [洋 刘](https://appshunter.io/developer/6775317751) |

## What reviewers say

### PIDTuner

[App page](https://appshunter.io/ios/app/pidtuner/id6742595880)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Control System Calc

[App page](https://appshunter.io/ios/app/control-system-calc/id6791956580)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PIDTuner free?

PIDTuner costs $0.99, with no in-app purchases.

### Is Control System Calc free?

Control System Calc is free to download, with no in-app purchases.

### Do PIDTuner or Control System Calc have ads?

Neither PIDTuner nor Control System Calc 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.*