# RF Slide Rule vs Pocket Shack

The clearest difference is in-app purchases: RF Slide Rule at none against Pocket Shack's 3. RF Slide Rule also leads on iOS requirement (7.0 vs 26.1). On price, ads and device support there is nothing between them.

Both are free to download. Pocket Shack sells 3 in-app purchases, starting at $1.99 per month. RF Slide Rule asks for nothing beyond the download.

## The numbers

| Metric | RF Slide Rule | Pocket Shack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | — |
| Size | 1 MB | 18 MB |
| Requires iOS | **7.0** | 26.1 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [CEC, S.A.](https://appshunter.io/developer/537230070) | [Cygnus Strategy](https://appshunter.io/developer/6819876728) |

## What reviewers say

### RF Slide Rule

[App page](https://appshunter.io/ios/app/rf-slide-rule/id448166676)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pocket Shack

[App page](https://appshunter.io/ios/app/pocket-shack/id6819876726)

**Features:** Family Sharing, Siri integration, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pocket Shack Pro, Monthly | $1.99 | per month |
| Pocket Shack Pro, Yearly | $14.99 | per year |
| Pocket Shack Pro, Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is RF Slide Rule free?

RF Slide Rule is free to download, with no in-app purchases.

### Is Pocket Shack free?

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

### Do RF Slide Rule or Pocket Shack have ads?

Neither RF Slide Rule nor Pocket Shack shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*