# STS(스마트 트레이너 시스템) vs I POSTURE

STS(스마트 트레이너 시스템) and I POSTURE 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, I POSTURE every 3 weeks. The most recent releases landed on October 27, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | STS(스마트 트레이너 시스템) | I POSTURE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 91.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 148 MB |
| Requires iOS | 15.4 | **14.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Byunggon Kim](https://appshunter.io/developer/1631341518) | [chulwon Kim](https://appshunter.io/developer/1758245077) |

## What reviewers say

### STS(스마트 트레이너 시스템)

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

**Features:** macOS Compatibility

**In-app purchases:** none


### I POSTURE

[App page](https://appshunter.io/ios/app/i-posture-ai-and/id6736387040)

This app uses AI motion recognition to analyze your body shape and provide personalized posture correction and exercise solutions. It helps manage children's posture and growth, alleviate pain from long work hours, and offers tailored fitness plans for weight loss.

**Highlights:** AI motion recognition body analysis, Personalized posture correction solutions, Customized exercise plans, Body balance assessment, Skeletal simulation, Progress tracking

**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 I POSTURE free?

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

### Do STS(스마트 트레이너 시스템) or I POSTURE have ads?

Neither STS(스마트 트레이너 시스템) nor I POSTURE shows ads.

### Which is updated more often, STS(스마트 트레이너 시스템) or I POSTURE?

STS(스마트 트레이너 시스템) ships an update monthly, and I POSTURE every 3 weeks. Most recently, STS(스마트 트레이너 시스템) was updated on October 27, 2026 and I POSTURE on November 8, 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.*