To try CallFreq without waiting for Google Android phones to come to a mobile operator near you, use this interactive demo. Select a contact you wish to call with a mouse (the status bar will show you how many conversation you had with the contact before). Once selected, click the contact again to begin a call. The contact will move up the list after the call.

You can sort the contacts based on hourly, daily, weekly or mothly intervals by selecting a switch on top. You will see the contacts based on frequency of calling in the selected time frame. For example, if you called someone intensively last week, but not this week, the person will NOT appear in "hour" and "day" screens, but WILL appear in "week" and "month" screens. It does not matter if you called them or they called you - all phone calls count.

In case you worry who all those people in contact book are: they are mostly presidents and prime ministers. There are also a couple of kings there. Check if you national leader is there - you may wish to finally check his or her phone number.

Unfortunately, we cannot actually dial the numbers yet - so the call will most likely not get through. If the call is dropped, you will see a prompt, and then you will return back to the dialer. However, keep trying and you will be rewarded!