It's designed to automatically pull your medical records from your EMR -- but users can also enter their conditions, medications and procedures manually. We have plans to allow users to manually enter their lab results [2], however that feature has not been implemented yet.
Fasten is still a work-in-progress, but if you're willing to contribute we have a pretty active discord (linked in the README).
[1]: https://github.com/fastenhealth/fasten-onprem/ [2]: https://github.com/fastenhealth/fasten-onprem/issues/137