AQICN vs Weatherstack
Same instrument, two spec sheets — measured, not claimed.
AQICN vs Weatherstack: common questions
Which is more reliable, AQICN or Weatherstack?
Both are neck-and-neck — AQICN and Weatherstack each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, AQICN or Weatherstack?
AQICN has the lower median latency in our checks — AQICN responds in 224 ms versus Weatherstack at 309 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 AQICN and Weatherstack need an API key?
Both ask you to authenticate — AQICN uses an API key and Weatherstack uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.
Can I call AQICN and Weatherstack from the browser?
Neither sends browser-friendly CORS headers reliably, so call AQICN and Weatherstack from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are AQICN and Weatherstack free for commercial use?
AQICN has unclear commercial terms, and Weatherstack 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.