Free UV Index API vs GrünstromIndex
Same instrument, two spec sheets — measured, not claimed.
Free UV Index API vs GrünstromIndex: common questions
Which is more reliable, Free UV Index API or GrünstromIndex?
On our scheduled checks, Free UV Index API leads on measured uptime — Free UV Index API at 99.02% versus GrünstromIndex at 73.5% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Free UV Index API or GrünstromIndex?
Free UV Index API has the lower median latency in our checks — Free UV Index API responds in 284 ms versus GrünstromIndex at 1072 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do Free UV Index API and GrünstromIndex need an API key?
Neither needs a paid key — Free UV Index API is callable with no signup, and GrünstromIndex is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Free UV Index API and GrünstromIndex from the browser?
Yes — both Free UV Index API and GrünstromIndex send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are Free UV Index API and GrünstromIndex free for commercial use?
Free UV Index API has unclear commercial terms, and GrünstromIndex has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.