# Opamp tools vs PIDSimLab

The clearest difference is price: Opamp tools at Free against PIDSimLab's $0.99. Opamp tools also leads on iOS requirement (12.0 vs 17.6). PIDSimLab's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Opamp tools is free to download; PIDSimLab costs $0.99 up front. Opamp tools sells 1 one-off in-app purchase. PIDSimLab asks for nothing beyond the download.

## The numbers

| Metric | Opamp tools | PIDSimLab |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 12 months | — |
| Size | 4 MB | 15 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [BZP DESTEK SISTEMLERI TEKNOLOJI ARGE SANAYI VE TICARET LIMITED SIRKETI](https://appshunter.io/developer/1864169848) |

## What reviewers say

### Opamp tools

[App page](https://appshunter.io/ios/app/opamp-tools/id1616271826)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock pro feature | $1.99 | one-time |


### PIDSimLab

[App page](https://appshunter.io/ios/app/pidsimlab/id6757006987)

**In-app purchases:** none


## Frequently asked questions

### Is Opamp tools free?

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

### Is PIDSimLab free?

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

### Do Opamp tools or PIDSimLab have ads?

Neither Opamp tools nor PIDSimLab 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.*