Incorrect results – WiFi Check - speed tool Review

This app requires to be started on 2 Apple devices then hit Start button on one of them. The weirdest things is that I got speed results between devices measured by this app different than results measured by the famous high precision speed test by Ookla between one device and the internet. Have a look at the numbers: Service/download/upload in Mbits/s: WiFi SpeedTest/10.32/14.34 Ookla SpeedTest/24.48/11.2 The upload 11.2 here is limited by the isp while the number 24.48 says that my router is allowing this download speed from the net to reach my iPhone where this speed is measured. On the other hand, this app sends files from one device to another, which means the download speed won't be far from the upload speed coz the upload for one is the download for another device. Short and brief, either the numbers measured by this app are wrong or my router needs the upload speed to be tweaked! I support the first opinion.
Review by USForces on WiFi Check - speed tool.