Why won't my iphone work on my home Wi-Fi?

It works at my schools Wi-Fi, friends Wi-Fi but not at home? My phone connects to the Wi-Fi it just won't work at all on the safari or any apps that need internet
is it because there are to many items on my home Wi-Fi?
my 3 siblings have ipod touches, a game boy ds, a Wii and my mom has an iPhone and apple tv, a HP tablet, her boyfriends iphone on our Wi-Fi too and an Xbox 360.

This happens to me as well. It says I'm connected but it won't work. But I used my home Wi-Fi for many devices.once I disconnected about 3 devices from my home Wi-Fi and the Wi-Fi on my iPhone started working just well. If you want your Wi-Fi to work you have to have people disconnect to it.once too many people use the same Wi-Fi the Wi-Fi starts to slow down until it barely works.

Apple is bad

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