# ST50i vs Sermes SIMALMO IoT

The clearest difference is iOS requirement: ST50i at 12.0 against Sermes SIMALMO IoT's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

ST50i ships an update every 4 months, Sermes SIMALMO IoT every 3 months. The most recent releases landed on October 18, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ST50i | Sermes SIMALMO IoT |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 2 MB | 33 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [STIM](https://appshunter.io/developer/409841037) | [Dfi-Elec](https://appshunter.io/developer/1444729252) |

## What reviewers say

### ST50i

[App page](https://appshunter.io/ios/app/st50i/id409841034)

This utility app allows users to remotely connect to various STIM ST400 series machines and IP series devices from their iPhone or iPad. It provides access to industrial equipment for monitoring and control.

**Highlights:** Remote connection to STIM machines, Supports ST400, ST4100, ST4400, ST4600 models, Supports IP602, IP603, IP604, IP605 models, iPhone and iPad compatibility, Industrial equipment access

**Features:** macOS Compatibility

**In-app purchases:** none


### Sermes SIMALMO IoT

[App page](https://appshunter.io/ios/app/sermes-simalmo-iot/id6736702163)

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

**In-app purchases:** none


## Frequently asked questions

### Is ST50i free?

ST50i is free to download, with no in-app purchases.

### Is Sermes SIMALMO IoT free?

Sermes SIMALMO IoT is free to download, with no in-app purchases.

### Do ST50i or Sermes SIMALMO IoT have ads?

Neither ST50i nor Sermes SIMALMO IoT shows ads.

### Which is updated more often, ST50i or Sermes SIMALMO IoT?

ST50i ships an update every 4 months, and Sermes SIMALMO IoT every 3 months. Most recently, ST50i was updated on October 18, 2026 and Sermes SIMALMO IoT on October 8, 2026.

---

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