IOS 9 (8.4.1) Jailbreak without buying the tool for 20 € ?

Hi guys,
i Updated my iphone 4s to Ios 8.4.1.
On pangu website is a jailbreak link for 8.4.1, but there is a instruction for IOS 9.0.2.
Does that mean i can use the IOS 9.0.2 jailbreak tool for ios 8.4.1 too ?
And how can is use the jailbreak tool without buying it for f**ing 20 dollars ?