# SpanSet Payload Controller vs Mertis

The clearest difference is update cadence: Mertis at monthly against SpanSet Payload Controller's every 2 months. SpanSet Payload Controller's advantage is iOS requirement (13.0 vs 15.0). 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.

SpanSet Payload Controller ships an update every 2 months, Mertis monthly. Both last shipped on October 2, 2026.

## The numbers

| Metric | SpanSet Payload Controller | Mertis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 7 MB | 32 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Span Set GmbH & Co. KG](https://appshunter.io/developer/569512606) | [Klaas Dons](https://appshunter.io/developer/1253103875) |

## What reviewers say

### SpanSet Payload Controller

[App page](https://appshunter.io/ios/app/spanset-payload-controller/id946925049)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mertis

[App page](https://appshunter.io/ios/app/mertis/id1477611953)

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

**In-app purchases:** none


## Frequently asked questions

### Is SpanSet Payload Controller free?

SpanSet Payload Controller is free to download, with no in-app purchases.

### Is Mertis free?

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

### Do SpanSet Payload Controller or Mertis have ads?

Neither SpanSet Payload Controller nor Mertis shows ads.

### Which is updated more often, SpanSet Payload Controller or Mertis?

SpanSet Payload Controller ships an update every 2 months, and Mertis monthly. Most recently, SpanSet Payload Controller was updated on October 2, 2026 and Mertis on October 2, 2026.

---

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