# SmartScan Control vs JG Underfloor

The clearest difference is iOS requirement: JG Underfloor at 12.0 against SmartScan Control's 15.6. 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.

SmartScan Control ships an update every 17 months, JG Underfloor every 14 months. The most recent releases landed on October 5, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | SmartScan Control | JG Underfloor |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 14 months** |
| Monetization | — | Free |
| Size | 16 MB | 177 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thorlux](https://appshunter.io/developer/1263513405) | [Reliance Worldwide Corporation aust. Pty. Ltd.](https://appshunter.io/developer/1638011999) |

## What reviewers say

### SmartScan Control

[App page](https://appshunter.io/ios/app/smartscan-control/id1263513406)

**Features:** macOS Compatibility

**In-app purchases:** none


### JG Underfloor

[App page](https://appshunter.io/ios/app/jg-underfloor/id1638011997)

Control your home's underfloor heating system with this intuitive app. Manage thermostats and timers for ultimate zone control and easy configuration of both RF and hard-wired systems.

**Highlights:** Connect to John Guest thermostats, Manage timers, Zone control, Configure RF systems, Configure hard-wired systems, Intuitive user interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmartScan Control free?

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

### Is JG Underfloor free?

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

### Do SmartScan Control or JG Underfloor have ads?

Neither SmartScan Control nor JG Underfloor shows ads.

### Which is updated more often, SmartScan Control or JG Underfloor?

SmartScan Control ships an update every 17 months, and JG Underfloor every 14 months. Most recently, SmartScan Control was updated on October 5, 2026 and JG Underfloor on September 24, 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.*