Bright Sky (DWD) vs IPMA
Same instrument, two spec sheets — measured, not claimed.
Bright Sky (DWD) vs IPMA: common questions
Which is more reliable, Bright Sky (DWD) or IPMA?
On our scheduled checks, Bright Sky (DWD) leads on measured uptime — Bright Sky (DWD) at 99.02% versus IPMA at 98.0% 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, Bright Sky (DWD) or IPMA?
Bright Sky (DWD) has the lower median latency in our checks — Bright Sky (DWD) responds in 656 ms versus IPMA at 1024 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 Bright Sky (DWD) and IPMA need an API key?
Neither needs a paid key — Bright Sky (DWD) is callable with no signup, and IPMA is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Bright Sky (DWD) and IPMA from the browser?
Yes — both Bright Sky (DWD) and IPMA 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 Bright Sky (DWD) and IPMA free for commercial use?
Bright Sky (DWD) has unclear commercial terms, and IPMA 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.