The solution had to be affordable and accessible and to work even without an internet connection. The app we developed allows an EEG operator to connect via Bluetooth to an amplifier connected to an EEG cap. 
The EEG operator can fill in a pre-interview to gather information about the patient. Afterwards, the app walks the operator through a series of guided exercises for calibration, hyperventilation, and photic stimulation while recording the EEG with the information captured by the electrodes in the cap.
As a final step, the operator fills in an evaluation form, which is uploaded to the cloud, where medical specialists can access it remotely.
The app development process followed the IEC 62304 standard for regulatory purposes in order for the app to be certified as a medical device.