Clairvoyants are people who have the ability to see hidden things, things we couldn't see with our eyes. They can connect them to beyond or soemthing we can't see.
In fact they are much people who know how interpret our feelings and life than people who realy see the future or the past but in many cases there predictions are right.
Yes many people who asked fortune tellers or clairvoyants have seen there predictions become real.
Clairvoyants can read the future without anything to help them, it is the mediums, they have "flashs" where they can se the future of someone brievly.
Many clairvoyants the web says that but ere in free psychic reading we doesn't trust them. First because if it is true it is very uncommon, so they are too much for us on the web (or they are all there!) and in a second hand we doesn't trust people who says they can read future without any tool at anytimes for anyone...
For us it is not a bad thing to read future with a tool like astrology, rune or tarot, it is even a proove of modesty, honesty and profesionnalism. If somenone lie at the beginning, if it is the first thing he does on is website, how can we trust him for clairvoyance? When we ask a clairvoyant it is a part of us we give.
Be careful, a real good clairvoyant doesn't lie, he tell you his name (real name) he gives you free prices and all informations you want or need before starting is work and if he use tools like tarot cards, it is just he knows that clairvoyance is not a thing we ask at anytime, it is something which needs concentration and humanity.
That's the last thing: in conclusion clairvoyance is humanity, if your clairvoyant is not human (program for exemple or a student) it means that your service is a bad one.