Yes, several people can use Vitastiq. You can use the PROFILE section in the Vitastiq app to create multiple profiles.
However, Vitastiq 1 and 2 are self-measuring gadgets and are meant for independent use only (no one else should be touching the Vitastiq pen while you are using it to get the vitamin and mineral readings).
With Vitastiq Family you can take the readings of your family members or other people, thaks to the additional sonde that comes with the Vitastiq pen.
What an innovative project! You can track your vitamin trend anywhere, anytime with Vitastiq!