# Contact Pro IoT vs Rhoss TEMA

The clearest difference is update cadence: Rhoss TEMA at every 3 weeks against Contact Pro IoT's every 18 months. Contact Pro IoT's advantage is iOS requirement (13.0 vs 18.0). 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.

Contact Pro IoT ships an update every 18 months, Rhoss TEMA every 3 weeks. Both last shipped on September 9, 2026.

## The numbers

| Metric | Contact Pro IoT | Rhoss TEMA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 3 weeks** |
| Size | 33 MB | 28 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sysman srl](https://appshunter.io/developer/946937588) | [Rhoss s.p.a](https://appshunter.io/developer/1836579122) |

## What reviewers say

### Contact Pro IoT

[App page](https://appshunter.io/ios/app/contact-pro-iot/id1488893920)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rhoss TEMA

[App page](https://appshunter.io/ios/app/rhoss-tema/id6751742021)

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

**In-app purchases:** none


## Frequently asked questions

### Is Contact Pro IoT free?

Contact Pro IoT is free to download, with no in-app purchases.

### Is Rhoss TEMA free?

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

### Do Contact Pro IoT or Rhoss TEMA have ads?

Neither Contact Pro IoT nor Rhoss TEMA shows ads.

### Which is updated more often, Contact Pro IoT or Rhoss TEMA?

Contact Pro IoT ships an update every 18 months, and Rhoss TEMA every 3 weeks. Most recently, Contact Pro IoT was updated on September 9, 2026 and Rhoss TEMA on September 9, 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.*