Nowadays I have bad dreams and I am looking for an iOS app / EEG device that can measure electronic brain activity / store data in Health app / device can bought on a reasonable price.
I googled it, but I did not found solution meet all criteria.
Anyway I would be interested for this device able to use with iPhone together
EEG (electroencephalogram) to measure and record brain wave activity
EMG (electromyogram) to record muscle activity such as face twitches, teeth grinding, and leg movements; it also helps in determining the presence of REM stage sleep.
EOG (electro-oculogram) to record eye movements; these movements are important in determining the different sleep stages, particularly REM stage sleep.
EKG (electrocardiogram) to record heart rate and rhythm