# RF Circuit Toolbox vs Opamp tools

The clearest difference is in-app purchases: RF Circuit Toolbox at none against Opamp tools's 1. RF Circuit Toolbox also leads on iOS requirement (8.2 vs 12.0). On price, ads and device support there is nothing between them.

Both are free to download. Opamp tools sells 1 one-off in-app purchase. RF Circuit Toolbox asks for nothing beyond the download.

## The numbers

| Metric | RF Circuit Toolbox | Opamp tools |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 12 months |
| Size | 26 MB | 4 MB |
| Requires iOS | **8.2** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danmarks Tekniske Universitet](https://appshunter.io/developer/546654639) | [Siu Yuen Ho](https://appshunter.io/developer/814088527) |

## What reviewers say

### RF Circuit Toolbox

[App page](https://appshunter.io/ios/app/rf-circuit-toolbox/id1142515821)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is RF Circuit Toolbox free?

RF Circuit Toolbox is free to download, with no in-app purchases.

### Is Opamp tools free?

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

### Do RF Circuit Toolbox or Opamp tools have ads?

Neither RF Circuit Toolbox nor Opamp tools 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.*