Comparison

KSTAR Sync vs DARSA Solar & Charge

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KSTAR Sync

Features
Read full description

Designed for energy system managers, O&M engineers, and power users, our app simplifies the complexities of power station monitoring and maintenance. Stay seamlessly connected to your assets and take full control, no matter where you are. Key Features: Comprehensive Real-Time Monitoring All-in-One Dashboard: Get a complete overview of all critical data, including power generation, energy storage status, charging power, and load consumption in one place. Intuitive Visualizations: Instantly understand energy dynamics and operational efficiency with clear trend graphs and power flow diagrams. Smart Alarm Center: Your First Line of Defense Multi-Level Push Alerts: Receive real-time notifications categorized by severity (Emergency, Major, Minor), ensuring you never miss a critical event. Closed-Loop Management: Track the entire lifecycle of an alarm, from detection to resolution, creating a complete and reliable maintenance archive. Historical Analysis: Easily query past alarm records to analyze system weak points and prevent future incidents. Efficient Remote Operations & Control Remote Start/Stop: Control your power station or specific equipment from anywhere, eliminating the need for on-site visits. Flexible Strategy Switching: Instantly switch between operational strategies like "Self-Consumption" or "Time-of-Use Control" with a single tap to maximize your economic returns.

About

DARSA Solar & Charge

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
Read full description

Explore your solar potential before you plan your installation. DARSA Solar & Charge helps you estimate photovoltaic production, compare roof orientations and prepare an informed inquiry for your home, business or solar park. START WITH YOUR LOCATION Search for a place, choose a point on the map or use optional device location. Explore solar irradiation and photovoltaic potential using JRC PVGIS data from the European Commission, within the available geographic coverage. CONFIGURE YOUR SOLAR SYSTEM Enter installed capacity and adjust panel tilt. Select one or several roof orientations, with shared or individual tilt and capacity values. Choose an on-grid, off-grid or hybrid system and record nominal battery capacity for your inquiry. UNDERSTAND YOUR ESTIMATE View estimated annual and monthly production and compare your configuration with an optimal position. Equivalent sun hours provide an energy-equivalent daily average derived from PVGIS irradiation; they are not a count of sunny days or a weather forecast. SAVE AND PREPARE AN INQUIRY Keep calculations and drafts locally. Add your contact details, roof photos and electricity-bill images, review the inquiry and send it through the native mail composer. Nothing is sent automatically. Sending attachments requires a configured iOS Mail account. MADE FOR YOUR DEVICE A visual home screen for homes, businesses and solar parks, interactive roof-tilt controls, native Apple maps and an adaptive interface for iPhone, iPhone Duo and iPad. Available in English, Serbian, German, French and Italian. Free to use. No account, subscription, advertising or tracking SDK is required. IMPORTANT Results are multi-year estimates, not guaranteed production or a detailed engineering design. System losses of 14% are an assumption. Local shading, equipment condition, battery operation and autonomy are not modelled. Nominal battery capacity is an inquiry specification. New calculations, maps and search require internet access and supported data coverage.

Screenshots

KSTAR Sync4 screens
DARSA Solar & Charge4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 8 level
KSTAR Sync versus DARSA Solar & Charge: the parameters behind the verdict, then further details
ParameterKSTAR SyncDARSA Solar & Charge
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.0 — better18.6
Further details — not scored
Size76 MB62 MB
Age rating4+4+
DeveloperShenzhen Kstar Science & Technology Co., Ltd.DARSA Solar & charge doo Kragujevac

In-app purchases

None

KSTAR Sync

No in-app purchases

None

DARSA Solar & Charge

No in-app purchases

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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