# ronfic zone vs STS(스마트 트레이너 시스템)

The clearest difference is iOS requirement: ronfic zone at 12.0 against STS(스마트 트레이너 시스템)'s 15.4. 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.

ronfic zone ships an update every 3 weeks, STS(스마트 트레이너 시스템) monthly. The most recent releases landed on September 5, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | ronfic zone | STS(스마트 트레이너 시스템) |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 120 MB | 11 MB |
| Requires iOS | **12.0** | 15.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [ronfic co](https://appshunter.io/developer/1488855839) | [Byunggon Kim](https://appshunter.io/developer/1631341518) |

## What reviewers say

### ronfic zone

[App page](https://appshunter.io/ios/app/ronfic-zone/id1545681283)

**Features:** macOS Compatibility

**In-app purchases:** none


### STS(스마트 트레이너 시스템)

[App page](https://appshunter.io/ios/app/sts/id1631341516)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ronfic zone free?

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

### Is STS(스마트 트레이너 시스템) free?

STS(스마트 트레이너 시스템) is free to download, with no in-app purchases.

### Do ronfic zone or STS(스마트 트레이너 시스템) have ads?

Neither ronfic zone nor STS(스마트 트레이너 시스템) shows ads.

### Which is updated more often, ronfic zone or STS(스마트 트레이너 시스템)?

ronfic zone ships an update every 3 weeks, and STS(스마트 트레이너 시스템) monthly. Most recently, ronfic zone was updated on September 5, 2026 and STS(스마트 트레이너 시스템) on September 10, 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.*