# HeatNext vs STJ79

The clearest difference is in-app purchases: STJ79 at none against HeatNext's 4. HeatNext's advantage is update cadence (every 2 months vs every 4 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. HeatNext sells 4 in-app purchases, starting at $1.99 per month. STJ79 asks for nothing beyond the download.

HeatNext ships an update every 2 months, STJ79 every 4 months. The most recent releases landed on September 15, 2026 and May 13, 2026 respectively.

## The numbers

| Metric | HeatNext | STJ79 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 32 MB | 14 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nomnio](https://appshunter.io/developer/1440372439) | [亚男 杨](https://appshunter.io/developer/1485381560) |

## What reviewers say

### HeatNext

[App page](https://appshunter.io/ios/app/heatnext/id1440372440)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Package | $1.99 | per month |
| Advanced Package | $3.99 | per month |
| Plus Package | $18.99 | per year |
| Advanced Package | $37.99 | per year |


### STJ79

[App page](https://appshunter.io/ios/app/stj79/id1485381561)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HeatNext free?

HeatNext is free to download, with in-app purchases available.

### Is STJ79 free?

STJ79 is free to download, with no in-app purchases.

### Do HeatNext or STJ79 have ads?

Neither HeatNext nor STJ79 shows ads.

### Which is updated more often, HeatNext or STJ79?

HeatNext ships an update every 2 months, and STJ79 every 4 months. Most recently, HeatNext was updated on September 15, 2026 and STJ79 on May 13, 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.*