# STJ79 vs R

The clearest difference is update cadence: R at every 10 days against STJ79's every 4 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.

STJ79 ships an update every 4 months, R every 10 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | STJ79 | R |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Size | 14 MB | 55 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [亚男 杨](https://appshunter.io/developer/1485381560) | [坚栋 王](https://appshunter.io/developer/1887912020) |

## What reviewers say

### STJ79

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

**Features:** macOS Compatibility

**In-app purchases:** none


### R

[App page](https://appshunter.io/ios/app/r-sense/id6758199369)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STJ79 free?

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

### Is R free?

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

### Do STJ79 or R have ads?

Neither STJ79 nor R shows ads.

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

STJ79 ships an update every 4 months, and R every 10 days. Most recently, STJ79 was updated on October 29, 2026 and R on October 25, 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.*