# KSTAR Sync vs SEMS+

KSTAR Sync and SEMS+ 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.

KSTAR Sync ships an update every 2 weeks, SEMS+ every 8 days. The most recent releases landed on September 15, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | KSTAR Sync | SEMS+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.4 (12 ratings)](https://appshunter.io/ios/app/sems-plus/id6755710856/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 29.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Monetization | — | Free |
| Size | 74 MB | 268 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Kstar Science & Technology Co., Ltd.](https://appshunter.io/developer/1460236605) | [GoodWe Technologies Co., Ltd.](https://appshunter.io/developer/833350490) |

## What reviewers say

### KSTAR Sync

[App page](https://appshunter.io/ios/app/kstar-sync/id6754310380)

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

**In-app purchases:** none


### SEMS+

[App page](https://appshunter.io/ios/app/sems-plus/id6755710856)

This platform provides comprehensive energy system management for GoodWe devices. It offers real-time monitoring, energy flow visualization, and AI-driven health guidance. Users can remotely operate systems, receive smart alerts, and integrate multiple devices for efficient energy management and performance optimization.

**Highlights:** Real-time system and device monitoring, Energy flow visualization, AI health expert guidance, Remote operation, Smart alerts, Multi-device integration

**In-app purchases:** none


## Frequently asked questions

### Is KSTAR Sync free?

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

### Is SEMS+ free?

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

### Do KSTAR Sync or SEMS+ have ads?

Neither KSTAR Sync nor SEMS+ shows ads.

### Which is updated more often, KSTAR Sync or SEMS+?

KSTAR Sync ships an update every 2 weeks, and SEMS+ every 8 days. Most recently, KSTAR Sync was updated on September 15, 2026 and SEMS+ on September 22, 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.*