# Pergamum vs Radar RSC

The clearest difference is in-app purchases: Pergamum at none against Radar RSC's 2. Radar RSC's advantage is update cadence (every 4 days vs every 10 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Radar RSC sells 2 in-app purchases, starting at $7.99 per month. Pergamum asks for nothing beyond the download.

Pergamum ships an update every 10 days, Radar RSC every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Pergamum | Radar RSC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 4 days** |
| Size | 22 MB | 46 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [FTD Digital Arena](https://appshunter.io/developer/736259721) | [bruno pestana](https://appshunter.io/developer/6773127532) |

## What reviewers say

### Pergamum

[App page](https://appshunter.io/ios/app/pergamum/id6737863130)

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

**In-app purchases:** none


### Radar RSC

[App page](https://appshunter.io/ios/app/radar-rsc/id6773127530)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Radar RSC Advanced | $7.99 | per month |
| Radar RSC Pro | $11.99 | per month |


## Frequently asked questions

### Is Pergamum free?

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

### Is Radar RSC free?

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

### Do Pergamum or Radar RSC have ads?

Neither Pergamum nor Radar RSC shows ads.

### Which is updated more often, Pergamum or Radar RSC?

Pergamum ships an update every 10 days, and Radar RSC every 4 days. Most recently, Pergamum was updated on October 30, 2026 and Radar RSC on October 31, 2026.

---

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