i suggest use webchaver for your phone. there is a free app and you only have to play a small fee per month to use it. it’s a browser that registers every website you visit and sends it to a person of your choice (for example your rabbi) which is really good because instead of a filter, it makes you make the decision of what to look at. my suggestion is that once you download it, set up a restriction for safari (so you won’t use it in a time of desire) and restrict the app store (to not download other web browsers) and also youtube. and have someone else set your restrictions password and you’ll be good to go.