Just checked, at least they use "time.apple.com" as default, and the default "maximum of servers" is 5. https://github.com/lyft/Kronos/blob/master/Sources/NTPC

Just checked, at least they use "time.apple.com" as default, and the default "maximum of servers" is 5. https://github.com/lyft/Kronos/blob/master/Sources/NTPClient.swift https://github.com/lyft/Kronos/blob/master/Sources/NTPClient... The third-party library used by Snapchat didn't have any "maximum of servers" (using 30 at once(!)) and defaulted to many in the ntp.org pool, across all the continents!