# Sm@rtClient vs MaintMaster Inspector

The clearest difference is update cadence: MaintMaster Inspector at every 3 weeks against Sm@rtClient's every 10 months. MaintMaster Inspector also leads on iOS requirement (15.0 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.

Sm@rtClient ships an update every 10 months, MaintMaster Inspector every 3 weeks. The most recent releases landed on October 1, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Sm@rtClient | MaintMaster Inspector |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 57 MB | 36 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [MaintMaster Systems AB](https://appshunter.io/developer/1121513318) |

## What reviewers say

### Sm@rtClient

[App page](https://appshunter.io/ios/app/smrtclient/id874209707)

Remotely operate and monitor industrial HMI systems from your mobile device. Access operator stations, view system layouts, and interact with hardware buttons via touch input. Supports various SIMATIC HMI systems and offers both view-only and coordinated operation modes.

**Highlights:** Remote operation of HMI systems, View-only monitoring mode, Coordinated operation with active remote control, Access to hardware buttons, Automatic HMI panel detection, Browser-based access to Unified Panels, WebView access to PLC webpages

**In-app purchases:** none


### MaintMaster Inspector

[App page](https://appshunter.io/ios/app/maintmaster-inspector/id1353344272)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sm@rtClient free?

Sm@rtClient is free to download, with no in-app purchases.

### Is MaintMaster Inspector free?

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

### Do Sm@rtClient or MaintMaster Inspector have ads?

Neither Sm@rtClient nor MaintMaster Inspector shows ads.

### Which is updated more often, Sm@rtClient or MaintMaster Inspector?

Sm@rtClient ships an update every 10 months, and MaintMaster Inspector every 3 weeks. Most recently, Sm@rtClient was updated on October 1, 2026 and MaintMaster Inspector on September 10, 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.*