Church Calendar vs PostStack
Same instrument, two spec sheets — measured, not claimed.
Church Calendar vs PostStack: common questions
Which is more reliable, Church Calendar or PostStack?
Both are neck-and-neck — Church Calendar and PostStack 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, Church Calendar or PostStack?
Church Calendar has the lower median latency in our checks — Church Calendar responds in 848 ms versus PostStack at 1066 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 Church Calendar and PostStack need an API key?
Church Calendar needs no key, while PostStack requires a free API key. If you want to start calling without signup, reach for Church Calendar first.
Can I call Church Calendar and PostStack from the browser?
Neither sends browser-friendly CORS headers reliably, so call Church Calendar and PostStack from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are Church Calendar and PostStack free for commercial use?
Church Calendar has unclear commercial terms, and PostStack 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.