Totally inaccurate

I downloaded five different speed testers to see which gave me the most functionality with a simple interface. I used all multiple times, varying the order so I could get a fairly random sample. All came back with similar results except this one which said my speed for uploading and downloading was half to a third what the others said it was with the same parameters. This app was pretty and flashy, but the results werent presented in a clear fashion and were obviously inaccurate.

MaybeDog about 5GMARK (3G/4G/5G speed test)