# JG Underfloor vs Fresh Mango JIM

The clearest difference is update cadence: Fresh Mango JIM at every 7 months against JG Underfloor's every 22 months. 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.

JG Underfloor ships an update every 22 months, Fresh Mango JIM every 7 months. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | JG Underfloor | Fresh Mango JIM |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 7 months** |
| Monetization | Free | — |
| Size | 226 MB | 26 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Reliance Worldwide Corporation](https://appshunter.io/developer/1638011999) | [Fresh Mango Technologies (UK) Ltd](https://appshunter.io/developer/1804394520) |

## What reviewers say

### 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, Vision Pro support

**In-app purchases:** none


### Fresh Mango JIM

[App page](https://appshunter.io/ios/app/fresh-mango-jim/id6743766653)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JG Underfloor free?

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

### Is Fresh Mango JIM free?

Fresh Mango JIM is free to download, with no in-app purchases.

### Do JG Underfloor or Fresh Mango JIM have ads?

Neither JG Underfloor nor Fresh Mango JIM shows ads.

### Which is updated more often, JG Underfloor or Fresh Mango JIM?

JG Underfloor ships an update every 22 months, and Fresh Mango JIM every 7 months. Most recently, JG Underfloor was updated on October 24, 2026 and Fresh Mango JIM on October 12, 2026.

---

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