# KSTAR Sync vs DARSA Solar & Charge

The clearest difference is iOS requirement: KSTAR Sync at 14.0 against DARSA Solar & Charge's 18.6. 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.

KSTAR Sync ships an update every 2 weeks, DARSA Solar & Charge every 9 days. The most recent releases landed on November 9, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | KSTAR Sync | DARSA Solar & Charge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/darsa-solar-and-charge/id6811353176/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | — | Free |
| Size | 76 MB | 62 MB |
| Requires iOS | **14.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Kstar Science & Technology Co., Ltd.](https://appshunter.io/developer/1460236605) | [DARSA Solar & charge doo Kragujevac](https://appshunter.io/developer/6811353178) |

## 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


### DARSA Solar & Charge

[App page](https://appshunter.io/ios/app/darsa-solar-and-charge/id6811353176)

Estimate your solar panel production before installation. Compare roof orientations and system configurations to prepare an informed inquiry for your home or business. Save drafts and attach photos to send via email.

**Highlights:** Estimate photovoltaic production, Compare roof orientations, Configure solar system details, View estimated annual/monthly production, Save and prepare inquiries, Attach photos and bill images

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

**In-app purchases:** none


## Frequently asked questions

### Is KSTAR Sync free?

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

### Is DARSA Solar & Charge free?

DARSA Solar & Charge is free to download, with no in-app purchases.

### Do KSTAR Sync or DARSA Solar & Charge have ads?

Neither KSTAR Sync nor DARSA Solar & Charge shows ads.

### Which is updated more often, KSTAR Sync or DARSA Solar & Charge?

KSTAR Sync ships an update every 2 weeks, and DARSA Solar & Charge every 9 days. Most recently, KSTAR Sync was updated on November 9, 2026 and DARSA Solar & Charge on November 6, 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.*