# STS(스마트 트레이너 시스템) vs PLCO Coach

STS(스마트 트레이너 시스템) and PLCO Coach are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

STS(스마트 트레이너 시스템) ships an update monthly, PLCO Coach every 3 weeks. The most recent releases landed on September 10, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | STS(스마트 트레이너 시스템) | PLCO Coach |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 11 MB | 91 MB |
| Requires iOS | 15.4 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Byunggon Kim](https://appshunter.io/developer/1631341518) | [(주)큐엠아이티](https://appshunter.io/developer/1471797377) |

## What reviewers say

### STS(스마트 트레이너 시스템)

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

**Features:** macOS Compatibility

**In-app purchases:** none


### PLCO Coach

[App page](https://appshunter.io/ios/app/plco-coach/id6745809437)

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

**In-app purchases:** none


## Frequently asked questions

### Is STS(스마트 트레이너 시스템) free?

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

### Is PLCO Coach free?

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

### Do STS(스마트 트레이너 시스템) or PLCO Coach have ads?

Neither STS(스마트 트레이너 시스템) nor PLCO Coach shows ads.

### Which is updated more often, STS(스마트 트레이너 시스템) or PLCO Coach?

STS(스마트 트레이너 시스템) ships an update monthly, and PLCO Coach every 3 weeks. Most recently, STS(스마트 트레이너 시스템) was updated on September 10, 2026 and PLCO Coach on September 4, 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.*