# S vs KSTAR Sync

The clearest difference is update cadence: KSTAR Sync at every 2 weeks against S's monthly. 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.

S ships an update monthly, KSTAR Sync every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | S | KSTAR Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (15 ratings)](https://appshunter.io/ios/app/s-miles-installer/id1544207772/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 65.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 208 MB | 75 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hoymiles Power Electronics Inc.](https://appshunter.io/developer/1219594358) | [Shenzhen Kstar Science & Technology Co., Ltd.](https://appshunter.io/developer/1460236605) |

## What reviewers say

### S

[App page](https://appshunter.io/ios/app/s-miles-installer/id1544207772)

This app streamlines the installation and monitoring of distributed PV power plants. It offers an easy-to-use interface for setting up monitoring accounts and provides visual guidance for microinverter installation. Access plant-level and module-level power generation data, along with detailed alarm information for diagnostics.

**Highlights:** Easy account monitoring, Visual installation guide, Rapid account configuration, Plant-level data, Module-level data, Alarm information

**Features:** macOS Compatibility

**In-app purchases:** none


### KSTAR Sync

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

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

**In-app purchases:** none


## Frequently asked questions

### Is S free?

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

### Is KSTAR Sync free?

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

### Do S or KSTAR Sync have ads?

Neither S nor KSTAR Sync shows ads.

### Which is updated more often, S or KSTAR Sync?

S ships an update monthly, and KSTAR Sync every 2 weeks. Most recently, S was updated on October 24, 2026 and KSTAR Sync on October 24, 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.*