I would always advise - test on a browser rather than an App and on a computer or laptop....
And test speeds at https://speedtest.samknows.com/ - or https://www.speedtest.net/ - try on 2 different browsers - as Chrome sometimes gives odd results.
just been on samknows which a engineer told me it's the best speed tester well it says I'm getting 1222 download and 266 upload that would be great on through Ethernet cable but it's wifi on laptop so to my summary I think realspeed must be fixed ?
my download speed 86mbps bursting to 102
upload 44mbps bursting to 46 on thinkbroadband even worse on Speedtest ookla I've got 1gig