On the settings page scroll down to “CALCULATOR“, and open the panel.

With the first two settings, you can set which number should set the time (hour & minutes). You (or rather the spectator) can set the hour and minutes with two separate entries (like 6 and then 23), or even by entering one number (623). Everything will depend on your presentation.

Example #1:

2nd number sets the hour, 3rd number sets the minutes.

You give your phone with the calculator to the spectator, and ask them to enter some numbers and perform some calculations, like this:

1st number: they can enter any 5 digit number, then hit multiply (x)
2nd number: they should think of a time, and enter the hours (they can hit = if they want)
3rd number: they should press + (add) and then the minutes (again, they can hit = if they want)
(the time on the watch is now being set)
4th number: they should press / (divide) and any 3 digit number… and press =

Example input: 32574 x 9 + 23 / 275 = 1066,141818181818

They tell you the result, and you guess their thought of time (9:23). As a kicker, you show them that your watch shows the exact same time.

Example #2:

2nd number sets the hour, and also 2nd number sets the minutes.

You give your phone with the calculator to the spectator, and ask them to enter some numbers and perform some calculations, like this:

1st number: they can enter any 5 digit number, then hit multiply (x)
2nd number: they should think of a time, and enter the hours and minutes (they can hit = if they want)
(the time on the watch is now being set)
3rd number: they should press / (divide) and any 3 digit number… and press =

Example input: 18459 x 719 / 652 = 20355,86042944785

They tell you the result, and you guess their thought of time (7:19). As a kicker, you show them that your watch shows the exact same time.

The Force Number Method

On the settings page scroll down to “CALCULATOR“, and open the panel.

After you enable “Force the result“, you will see some new options. First of all you can set the number that you would like to force. If the number has decimal numbers, use a comma (like 123.456). The next option is “Force after numbers entered“, which means you can set when the force number should appear. If you set it to 4, then the force number will appear only after you (or the spectator) enter 4 numbers (with an operation in between), and you press the force key. And of course, there is the option to select the “Force key“, which can be the = (equals) or the √ (square root) key.

Example #1:

2nd number sets the hour and also the minutes. Force number is 123.456789, “Force after number entered” is set to 3, force key is = (equals).

You place a face-down prediction on the table. Then you give your phone with the calculator to the spectator, and ask them to enter some numbers and perform some calculations, like this:

1st number: they can enter any 5 digit number, then hit multiply (x)
2nd number: they should think of a time, and enter the hours and minutes (they can hit = if they want)
(the time on the watch is now being set)
3rd number: they should press / (divide) and any 3 digit number… and press =

Example input: 59864 x 1125 / 133 = 123.456789

At the end, your force number appears as the result of their calculation. You reveal your prediction, which matches the result. Then you guess their thought of time (11:25). As a kicker, you show them that your watch shows the exact same time.

Example #2:

3rd number sets the hour and also the minutes. Force number is 1234.56789, “Force after number entered” is set to 3, force key is √ (square root).

You place a face down prediction on the table. Then you give your phone with the calculator to the spectator, and ask them to enter some numbers and perform some calculations, like this:

1st number: they can enter any 5 digit number, then tap x (multiply)
2nd number: they should enter any 3 digit number, then hit + (add)
3rd number: they should think of a time, and enter the hours and minutes… and press =
(the time on the watch is now being set)

Finally you ask them to press the √ (square root) button.

Example input: 56412 x 128 + 542 = 7221278, and the square root is 1234.56789

At the end your force number appears as the result of their calculation. You reveal your prediction, which matches the result. Then you guess their thought of time (5:42). As a kicker, you show them that your watch shows the exact same time.