# HJM vs GModel

The clearest difference is update cadence: GModel at every 3 weeks against HJM's every 3 months. HJM's advantage is iOS requirement (13.0 vs 15.6). 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.

HJM ships an update every 3 months, GModel every 3 weeks. Both last shipped on September 30, 2026.

## The numbers

| Metric | HJM | GModel |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 27 MB | 31 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hermanos Julian M S.L.](https://appshunter.io/developer/1367547773) | [SafeBlockLab OU](https://appshunter.io/developer/1798435816) |

## What reviewers say

### HJM

[App page](https://appshunter.io/ios/app/hjm/id1367547774)

Manage your smart radiator temperatures easily and quickly from your smartphone. Adjust settings remotely without needing to be at home.

**Highlights:** Remote temperature management, Smart radiator control, Easy and quick adjustments, Smartphone access, Schedule temperature changes

**Features:** macOS Compatibility

**In-app purchases:** none


### GModel

[App page](https://appshunter.io/ios/app/gmodel/id6755604473)

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

**In-app purchases:** none


## Frequently asked questions

### Is HJM free?

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

### Is GModel free?

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

### Do HJM or GModel have ads?

Neither HJM nor GModel shows ads.

### Which is updated more often, HJM or GModel?

HJM ships an update every 3 months, and GModel every 3 weeks. Most recently, HJM was updated on September 30, 2026 and GModel on September 30, 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.*