Internet works perfectly on other devices except my iphone and macbook?

Its been like this for like 3 days. The Wi-Fi works fine with any other devices except my iphone and macbook? Its so slow and sometimes i didn't work at all i have to turn on and off the Wi-Fi from my iphone & macbook so it can connect again but its super slow and i don't know what to do because its really getting in my way of getting my stuff done

Not only have I had this type of issue, I have answered many questions here about this type of issue, and usually this is the solution:
Do a HARD RESET of the router. You will need to add the password to it after the reset.

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