Hi Nevaeh,
The closest thing to a completely free dating app or website out there of any real value would be POF and Facebook Dating, as long as you have a Facebook account. There are no strings attached. You get to see your matches and likes, and can send messages, all for free.
Other popular dating apps or websites like OkCupid, Bumble, Hinge and Tinder have some free features but people tend to get the best results when they pay for their premium features.