Yes! When adding someone to support, you can choose to add them without an email address. This will allow you to add medications for them, as well as log any skipped, missed, and taken doses!
For example:
John's daughter Melissa is nine years old and takes a certain medication twice a day for a chronic condition. Melissa doesn't have an email address to set up KEEP, so her dad, John, sets up KEEP for her. John (and anyone else involved in supporting Melissa) can add Melissa as a person they support on their KEEP app. Now John (and any other supporter) can track when Melissa forgets to take her meds and give her a gentle nudge, without having to ask her if she remembered to take them.