Once a week, same time of day, is plenty — daily numbers mostly show water shifts and make the trend harder to read, not easier.
This is the view worth checking before an appointment. Nausea three days after a dose increase looks very different from nausea that arrives the same week every cycle — and on separate screens those two are easy to confuse.
This is a log, not a diagnosis or a medical record. It's built to give a doctor better information than memory can — bring the PDF to appointments and let them interpret it.
This device will remember it. Entries save on this device either way — the passphrase only unlocks syncing.