# SIS Client App vs COMMAND Center™ Concrete 4

The clearest difference is iOS requirement: SIS Client App at 12.0 against COMMAND Center™ Concrete 4'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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 3, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | SIS Client App | COMMAND Center™ Concrete 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/command-center-concrete-4/id1625899714/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free |
| Size | 32 MB | 11 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Strategic Insurance Software, Inc.](https://appshunter.io/developer/583349800) | [Transtec](https://appshunter.io/developer/971934635) |

## What reviewers say

### SIS Client App

[App page](https://appshunter.io/ios/app/sis-client-app/id1464009081)

**Features:** macOS Compatibility

**In-app purchases:** none


### COMMAND Center™ Concrete 4

[App page](https://appshunter.io/ios/app/command-center-concrete-4/id1625899714)

Monitor concrete temperature and maturity in real-time. Transmit data wirelessly to the cloud for remote access and analysis. Generate reports and receive alerts for project specifications.

**Highlights:** Monitor concrete temperature history, Calculate maturity and evaluate strength, Wireless data transmission to cloud, Remote access from anywhere, Real-time alerts via text/email, Create and export reports (PDF, Excel), Organize sensor data by project

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

**In-app purchases:** none


## Frequently asked questions

### Is SIS Client App free?

SIS Client App is free to download, with no in-app purchases.

### Is COMMAND Center™ Concrete 4 free?

COMMAND Center™ Concrete 4 is free to download, with no in-app purchases.

### Do SIS Client App or COMMAND Center™ Concrete 4 have ads?

Neither SIS Client App nor COMMAND Center™ Concrete 4 shows ads.

### Which is updated more often, SIS Client App or COMMAND Center™ Concrete 4?

SIS Client App ships an update every 2 months, and COMMAND Center™ Concrete 4 every 2 months. Most recently, SIS Client App was updated on October 3, 2026 and COMMAND Center™ Concrete 4 on September 29, 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.*