Church Calendar vs Cisco Spark
Same instrument, two spec sheets — measured, not claimed.
Church Calendar vs Cisco Spark: common questions
Which is more reliable, Church Calendar or Cisco Spark?
On our scheduled checks, Church Calendar leads on measured uptime — Church Calendar at 100% versus Cisco Spark at 99.44% 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, Church Calendar or Cisco Spark?
Church Calendar has the lower median latency in our checks — Church Calendar responds in 430 ms versus Cisco Spark at 1331 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 Cisco Spark need an API key?
Church Calendar needs no key, while Cisco Spark requires a free API key. If you want to start calling without signup, reach for Church Calendar first.
Can I call Church Calendar and Cisco Spark from the browser?
Only Cisco Spark 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 Church Calendar and Cisco Spark free for commercial use?
Church Calendar has unclear commercial terms, and Cisco Spark 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.