When using our app you should know that the device's current date/time is used as the 'Completed' date/time for an entry. This time is only as good as the device. If the device time is not accurate, it will reflect on the Completed value as such.
Once the entry data is uploaded to the platform, our system timestamps the entry with what we call a 'Received' time. This is an accurate server time that cannot be changed or altered.
Therefore there are technically two times concerning each Form entry, a device-specific Completed time and a platform-specific Received time. The Received time may differ from the Completed time if the user was offline when completing the entry. If the user was offline for a substantial amount of time, then this time lag between when the entry is completed on device and when the entry is received by the platform can be substantial. Remind your users of this and ensure they're online for a successful upload and accurate time stamp.