website to watch movies with no ads

All free services will have ads... They need to make money to at least cover the server bills. Running a streaming company can get expensive quickly due to bandwidth costs.

However, I suggest just using any and trying an adblocker like the chrome extension.

Rather than the extension it's probably better to get a VPN with adblocker - free accounts pop up all over the internet - However, if the company you're streaming from is bad this will make connection even worse.