# KRL SmartBox vs Radtke+

The clearest difference is update cadence: Radtke+ at every 3 months against KRL SmartBox's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KRL SmartBox ships an update every 7 months, Radtke+ every 3 months. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KRL SmartBox | Radtke+ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Size | 33 MB | 43 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Witte Metallwaren Handelsges. mbH & Co. KG](https://appshunter.io/developer/979847433) | [Dr. Radtke CPM Chemisch-Physikalische Messtechnik AG](https://appshunter.io/developer/1735469468) |

## What reviewers say

### KRL SmartBox

[App page](https://appshunter.io/ios/app/krl-smartbox/id6477445537)

**Features:** macOS Compatibility

**In-app purchases:** none


### Radtke+

[App page](https://appshunter.io/ios/app/radtke-plus/id6479295531)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KRL SmartBox free?

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

### Is Radtke+ free?

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

### Do KRL SmartBox or Radtke+ have ads?

Neither KRL SmartBox nor Radtke+ shows ads.

### Which is updated more often, KRL SmartBox or Radtke+?

KRL SmartBox ships an update every 7 months, and Radtke+ every 3 months. Most recently, KRL SmartBox was updated on October 5, 2026 and Radtke+ on October 24, 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.*