Bluesky vs Church Calendar
Same instrument, two spec sheets — measured, not claimed.
Bluesky vs Church Calendar: common questions
Which is more reliable, Bluesky or Church Calendar?
On our scheduled checks, Church Calendar leads on measured uptime — Bluesky at 97.1% versus Church Calendar at 100% 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, Bluesky or Church Calendar?
Bluesky has the lower median latency in our checks — Bluesky responds in 268 ms versus Church Calendar at 848 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 Bluesky and Church Calendar need an API key?
Neither needs a paid key — Bluesky is callable with no signup, and Church Calendar is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Bluesky and Church Calendar from the browser?
Only Bluesky is browser-friendly — it returns CORS headers over HTTPS. Church Calendar needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Bluesky and Church Calendar free for commercial use?
Bluesky has unclear commercial terms, and Church Calendar 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.