# Radonsystem vs Calendar Scanner · EasyScan

The clearest difference is in-app purchases: Radonsystem at none against Calendar Scanner · EasyScan's 2. Radonsystem also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.0). Calendar Scanner · EasyScan's advantage is update cadence (every 3 months vs every 23 months). On price and device support there is nothing between them.

Both are free to download. Calendar Scanner · EasyScan sells 2 in-app purchases, starting at $5.99 per 7 days. Radonsystem asks for nothing beyond the download.

Radonsystem ships an update every 23 months, Calendar Scanner · EasyScan every 3 months. The most recent releases landed on September 9, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Radonsystem | Calendar Scanner · EasyScan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Every 3 months** |
| Size | 4 MB | 7 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Bernitt](https://appshunter.io/developer/1551635659) | [Felix Brix](https://appshunter.io/developer/1334750391) |

## What reviewers say

### Radonsystem

[App page](https://appshunter.io/ios/app/radonsystem/id1551635657)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calendar Scanner · EasyScan

[App page](https://appshunter.io/ios/app/calendar-scanner-easyscan/id6746195353)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EasyScan PRO | $5.99 | per 7 days |
| EasyScan PRO | $24.99 | per year |


## Frequently asked questions

### Is Radonsystem free?

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

### Is Calendar Scanner · EasyScan free?

Calendar Scanner · EasyScan is free to download, with in-app purchases available.

### Do Radonsystem or Calendar Scanner · EasyScan have ads?

Calendar Scanner · EasyScan shows ads; Radonsystem does not.

### Which is updated more often, Radonsystem or Calendar Scanner · EasyScan?

Radonsystem ships an update every 23 months, and Calendar Scanner · EasyScan every 3 months. Most recently, Radonsystem was updated on September 9, 2026 and Calendar Scanner · EasyScan on September 14, 2026.

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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.*