Dimension scores are derived from public data and fields; weighted into the composite. Reference only.
sunrisewhen.com is a free website for checking sunrise, sunset, dawn and dusk twilight, golden hour, blue hour, and UV index data, covering more than 146,000 cities worldwide. It is more of a practical tool for individuals and photography enthusiasts than a traditional SaaS or enterprise software product. The site emphasizes “no clutter, no ads, no account required,” making it suitable for quickly checking light-related information for your current location or a specified city.
The product centers on sun and light timing data, including sunrise and sunset, civil twilight, golden hour, blue hour, an all-day daylight overview, moon information, weather conditions, cloud cover, visibility, and UV index. Its solar position data is said to be calculated offline using astronomical algorithms, so it does not rely on external astronomy APIs; weather and UV data come from Open-Meteo. Another notable feature is the ability to turn a city’s full-year sun and moon data into a 50×70 cm museum-grade matte paper poster.
The lookup features are free and do not require registration. The main content does not disclose pricing for the poster product, nor does it provide information about subscription plans, enterprise editions, or API fees. The site states that some pages contain affiliate links, and it may earn a commission if users purchase recommended products.
Its advantages are an extremely low barrier to use, straightforward information, and no ads. Its privacy statement is also relatively restrained: it does not use cookies or collect personal data, and anonymous analytics are handled through self-hosted Umami. For photographers, golden hour and blue hour information has clear practical value.
The downside is that it lacks capabilities commonly found in SaaS or enterprise software, such as an account system, team collaboration, role-based permissions, auditing, APIs, batch queries, SLAs, enterprise support, and compliance certifications. The weather and UV sections rely on Open-Meteo, and the stability of this dependency is not explained.
It is suitable for photographers, runners, travelers, outdoor enthusiasts, and general users who simply want to quickly check sunrise, sunset, and UV conditions for a location. It is not suitable for organizations that need enterprise-grade integrations, data licensing, or automated access.
The main content does not provide information about access from mainland China, ICP filing, CDN deployment, or availability, so this remains unknown.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on sunrisewhen.com official site.
sunrisewhen.com is an Unknown Lookups provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach sunrisewhen.com directly.