Sunlight Clock Free vs RRA(SWTIS)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sunlight Clock Free
Visualize the current sunlight and darkness across the globe with interactive map projections. Track the sun's position or your own location automatically, or manually explore the map.
- Real-time sunlight visualization
- Multiple map projections
- Automatic sun/location tracking
- Manual map scrolling
- Interactive globe view
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Sunlight Clock shows you where the sun is shining in the world right now. You can choose different projections for rendering the map, including Mercator, Mollweide, azimuthal equidistant, and others. The map can automatically follow the sun or your location throughout the day. You can also scroll the map to place it how you like.
RRA(SWTIS)
This app provides real-time space weather data, forecasts, and alerts. It monitors solar activity and its potential effects on Earth, including impacts on aviation, satellites, and power grids.
- Real-time space weather monitoring
- 3-day space weather forecast
- Forecasting models and observation data
- Space weather effects analysis
- Space weather news and announcements
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What is the Solar flare? What's going on around the Sun and the Earth ? So, the KSWC finally developed this space weather mobile APP. It is expected that this APP is a portal site of the space weather, and provides the observation data, forecasting models and SWx monitors in real time. The KSWC was formally established as such in 2011, and 14th member of ISES(International Space Environment Service). The KSWC has dreamed of "the safety Korea without space weather disaster" by accurate forecasts and prompt alerts. The main features 1. Space weather now 2. 3-day forecast of space weather 3. forecasting models and observation data 4. Space weather effects(Aviation, satellites, GNSS, Power Grids, Communications) 5. NEWS and announcement of of KSWC The KSWC(Korea Space Weather Center) of RRA(Radio Research Agency) http://www.spaceweather.kasa.go.kr E-mail spaceweather@korea.kr
Screenshots
Verdict
The clearest difference is rating: RRA(SWTIS) at 5.0 against Sunlight Clock Free's 3.7. RRA(SWTIS) also leads on update cadence (every 4 months vs every 18 months) and review sentiment (86% vs 74%). Sunlight Clock Free's advantage is iOS requirement (8.0 vs 14.0). On price, ratings volume, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
RRA(SWTIS) holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 10 and 5 respectively. Written reviews point the same way: 74% of Sunlight Clock Free's written reviews are positive against 86% of RRA(SWTIS)'s.
Sunlight Clock Free ships an update every 18 months, RRA(SWTIS) every 4 months. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.
| Parameter | Sunlight Clock Free | RRA(SWTIS) |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (10 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 74.4% of reviews | 85.7% of reviews — better |
| Number of ratings | 10 — better | 5 |
| Update frequency | Every 18 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 12 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Milk LLC | 국립전파연구원 |
Customer experience
Sunlight Clock Free
RRA(SWTIS)
In-app purchases
Sunlight Clock Free
No in-app purchases
RRA(SWTIS)
No in-app purchases
