Hi Premo,
I am happy that you liked VB2. 
Are you mind reader? Today I was answering some emails and thinking it might be confusing with all devices and software revisions. While FFZ, FFV, FFA are reasonably compared at myrulet.com site there might be harder to understand the differences in between software and what to choose. In usual there were only program changes but now and FFV hardware is completely different also it’s not compatible with previous programs.
FFA is better for a team play (the prediction is made by audio trasmitted by earpice).
FFV is better for a single player, the prediction is indicated by vibration.
FFZ-T looks similar to FFV, what is the difference from FFV?
Yes FFA is the only one device that talks and it can be used for team play.
Of course it is easier when the computer talks but it needs wires and earpieces use induction which is not much covert. Another problem for all talking computer is timing the rotor. Talking computer has to calculate rotor movement form the start of clocking, therefore small mistakes to the end of spin may become large. FFZ and FFA are far better since rotor calculation is required only from moment of prediction and rotor can be clocked at any position while talking computers require it to be at same .
FFV I do not use much. Reason why I do not prefer it is because I place many chips in short time and for that I use both hands while clocking is done by foot. FFV really needs to be in the hand, vibration is short and it is hard to feel it on the other parts of body. Some people love it, holding it in between paper cards or chips. Even now there are 2 versions of FFV hardware. One original (all sold) and one modified (a custom variant) which is a bit smaller. It’s so small that one guy lost it in casino.
FFZ and FFV work exactly same and same program is used.
What you can see on the picture here is real FFZ. On side it has golden plated plates, facing players skin and instead of vibration it produces electric zaps. It has clocking switch on the board but external switch also can be attached. This device is suitable for foot clocking but if someone do not mind small electric zaps in between fingers it can be used by hand as well . (I use it often especially to set it.)
All devices have similar program, FFV/FFZ in addition have FF-VB2 program where VB2 can be played similar to visual prediction but a timer is used which has a variable time based on rotor speed. FF-VB2 can predict wheel in just 2 clicks (including rotor calculation) . Also FFZ/V have a built in timer where the player can adjust system to give him particular time from the moment the switch is pressed. So it is really an universal tool for advantage play.
New FFV in size is as ½ of casino chip, and about 5 mm in height. So again a bit smaller but new program the Acrobat is more powerful. The program is focused for semi tilted wheels. And it is first program for FFZ/FFV where the player can completely independently set it for ball clock or anti clock way or even for 2 different tables. It shows very good results but I couldn’t test it in casino since prototype unit is to large in size. We also do not know full potential of this program and how would be the best to use it in some particular situations since it is completely new concept.
All programs have unique feature to predict multiple times during same spin and to predict at any moment during the spin.
Can RC work with leveled wheels or they need only tilted wheels?
All systems can, but I do not mislead people. Leveled wheel prediction is hard and almost not possible earlier during the spin. Person you mentioned claimed predicting a leveled wheel 17 rotations before the end of spin. Even point one the diamond where the ball will hit. You can read in current post in VB2 section what is really happening with the ball regardless of shifting in ball deceleration. But if you have time to place chips when prediction is about 5th rotations and if ball scatter is reasonable the FF will produce an advantage and definitely better than any mobile phone application even if it is written for Android instead of 10 years old Nokia’s Symbian as scammers use. I am not even sure when mobile phone is running an application should it be called a roulette computer.
I’ve seen mobile phone application that simulates spirit level, but didn’t hear anyone calls such mobile a sport level or tried to build a hose with it. 
At the end I would like to know which is the best device for a novice, with a little knowledge of visual ballistic. And I would like to know also it they are all available for the purchase.
I am inclined for FFZ-T for its size and for the positive comments that I have read around.
Do you think it's the right choice? I read that it's very difficult to set it but that did not scare me!
Acrobat definitely is the best program but problem is that currently there will be only FFV to support it.
It looks as a problem to me since I like FFZ and foot clocking, but maybe with Acrobat foot clocking is not so suitable. With that in mind FFV is planned to be suitable for teeth clocking. (I’ll not supply this version to anyone who already don’t have one of FF’s)
Perhaps good deal for you would be to take package FFZ-T and then get and FFV when is ready. Cost is just a bit more than a single system. Reason for discount is my hope that one day I may work on a new FFZ as well and I still have some FFZ-T which could be harder to sell. Also it’s to give an additional option to someone who is not sure what to do.
I read that it's very difficult to set it but that did not scare me!
It’s not hard to set FFZ; all it takes is clock ball rotations.
Some earlier program versions had a problem if user didn’t have reasonable clocking skill and if the wheel has very small ball deceleration so the players mistakes were more noticeable to the system.
