I created a simple iPhone app to study the cognitive potentials of the human brain (auditory evoked potential P300). I call this application «NeuroLatency».

English is not my native language, so I apologize if something is not completely clear written in this letter.

If you have any question please email to


The app for entertainment and science purposes only. The app is not applicable to medicine. If you want to use the app for medicine — you must go to your doctor.

1) program purpose

— measurement and evaluation of cognitive evoked potential P300

2) order actions

— on this iPhone, you need to turn on Bluetooth

— put the gadget on your head and turn it on.

— in the program select the Test tab, select your device in the list of available devices.

— check the contact of skin

— please, press the button with the name «START?». after that, the program will play various stimuli (sounds with a frequency set in the settings)  and the number of the current era will be displayed on the button.

— the user needs to press a button when the target stimulus sounds

— the target stimulus will sound like this

— the deviant stimulus will sound 

— the ordinary stimulus will sound 

— after the number of epochs specified in the settings, the program proceeds to display the results on the «RESULT» tab

3) evaluation of results

— the graph on the Result tab shows the target stimuli a red line, the deviant stimuli  a dashed line, the rest of the stimuli  a blue line

— the user can publish the result of the study by clicking on the «share the result» button

4) tips and tricks

— the test result will be much more accurate if the user is in a relaxed state and with eyes closed

— the test is best carried out in a calm environment (silent room) and use headphones

5) artifact causes and incorrect test results

— blinking eyes and movement of facial muscles

— poor skin contact or dry skin at the site of contact