SunArc vs Solar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SunArc
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SunArc shows the sun’s path and position on a map for your location, date and time. See where shadows will fall, from buildings, trees or custom objects placed manually. Check how shadows change throughout the day and across different seasons. Will your solar panels still get enough sun in winter? Will that tree block the afternoon sun from your kitchen window? Or when will your terrace finally be in the shade? Useful for photographers, hikers, home buyers, balcony owners, campers, gardeners, beach lovers, future solar power heroes and vitamin D hunters. One purpose. No account. No ads. No subscription.
Solar
Estimate your photovoltaic system's energy output with detailed solar radiation and weather forecasts. Input your system's specifications to receive personalized output calculations and historical data for any location.
- PV output calculation
- Historical solar radiation
- 7-day solar radiation forecast
- System size, orientation, pitch input
- Sunshine duration and cloud cover
- Hourly solar radiation details
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Solar-Check provides comprehensive information about solar radiation and the expected output of your photovoltaic system at any selected location. Choose the location of your PV system and enter the system size, orientation, roof pitch and system losses. Solar-Check uses these values to calculate the expected PV output and presents important solar and weather data in a clear overview. Features: • Historical solar radiation for the selected location • PV output calculation for your solar system • Consideration of system size, orientation, roof pitch and system losses • Comparison with previous periods • 7-day solar radiation forecast • Expected PV output for the next 7 days • Daily direct and diffuse solar radiation • Sunshine duration, cloud cover, temperature and precipitation • Hourly solar radiation details • Hourly expected PV output • Location selection by search or map Solar-Check helps you understand the solar conditions at your location and estimate the potential output of your photovoltaic system. Actual energy production may vary depending on weather conditions, system performance, shading and other local factors.
Screenshots
Verdict
The clearest difference is in-app purchases: Solar at none against SunArc's 1. SunArc's advantage is iOS requirement (16.4 vs 26.2). On price, update cadence, ads and device support 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
Both are free to download. SunArc sells 1 one-off in-app purchase. Solar asks for nothing beyond the download.
SunArc ships an update every 3 weeks, Solar every 4 weeks. Both last shipped on November 10, 2026.
| Parameter | SunArc | Solar |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 26.2 |
| Further details — not scored | ||
| Size | 50 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Pascal von Burg | Gerhard Lentschik |
In-app purchases
SunArc
- ShadeCheck Unlock$0.99
Solar
No in-app purchases









