Magic Pen : the Cheating "Spin the bottle" App

Here is a magical app, 2 in 1. You will be able to amaze your friends by predicting things in advance! Pretend you are a mentalist, or just use the app, to influence fate in your favour !
You can control secretly the bottle by telling it where to stop. Or you can use it as a normal selector (without influencing it, so pure chance) of the objects / people surrounding the Iphone.

Some examples of presentation:
- You place 4 objects around the Iphone and you write a prediction on a piece of paper. The spectator spins the bottle, and when it stops towards an object, you discard it. After several throws, just an object is left: the one that matches your prediction!

- You are with 3 friends at the restaurant. You spin the bottle, and the last person remaining is the one who’s getting a free meal (and that will be you)!
 
- Influence fate by deciding whose turn it is during your party games, at home, at work, or at the bar… Decide who’s washing up the dishes, who’s doing the speech, who picks up the check, who kisses who...

- Play truth or dare. Write dares and truths on papers, place them around the Iphone, and it is your turn to play...

Easy to do! Nothing to program in advance! You set it up secretly where the bottle will stop under the nose of your audience, without them noticing anything suspicious!

Strong performing point: You can tell the bottle where to stop, but also where not to stop!