There are several things that affect Wi-Fi Speed
However if you are talking two different devices (I-Phone and laptop) on the SAME router at the same distance or better yet side by side the MOST likely is...
Frequency
I'm gueesing as Gdetailer did that the I-phone is connecting at 5GHZ
and the laptop at 2.4
If you really need the higher speed you have two choices. New 5GHZ laptop or
Cick here for a listI'd go with one of the smaller ones.. I saw a link for "Free install" one one ad when I googled and dang near fell off my chair lauging (To install. Plug it in, Windows 10 will auto-configure than you may need to turn the internal adapter off but that's about it)