Moving your period history to a new app
through Apple Health
2 min read · checked against its sources · updated 17 Oct 2026
Sometimes. Whether you can bring period dates out of Apple Health depends on the app you are moving to, because some apps only write to Health and never read from it. Period, Natural Cycles and Tideline can read period dates from Apple Health. Clue's help center says it cannot.
What the apps say
| Clue | Natural Cycles | Period | Tideline | |
|---|---|---|---|---|
| Reads from Apple Health | No | Yes | Yes | Yes, period dates |
| Writes to Apple Health | Yes | Yes (optional) | Yes | No, read-only |
| CSV import | Not mentioned | Not mentioned | Yes | Not mentioned |
Cells say "not mentioned" where I found no statement either way. That is not the same as "no".
Clue
Clue's help center says it is not possible to import data from Apple Health into Clue. The link only goes one way, from Clue to Health, and only for entries logged after you give permission. A second Clue article says there is no direct way to import from other period apps, and suggests entering past data by hand.
Natural Cycles
Its help center says the Apple Health integration works on iOS only. In Settings, under Integrations, you choose whether to import, export or both. Period and flow, spotting, cervical mucus, ovulation tests and sex can sync. Temperature cannot. The sync runs each time you open the app.
Period
The App Store listing says that connecting to Apple Health lets you import period and related data, and that you can also import a .csv file. If your history lives in a spreadsheet, this is the clearest route of the four. The listing doesn't say what the file must contain.
Tideline
Tideline's listing says it brings in period dates from Apple Health, and that it only reads them and never writes. It reads dates, so notes and symptoms from your old app won't come along. Imported periods also don't count as logged cycles, per the version notes, so the two-cycle doctor report builds from days you log in Tideline itself.
Before you switch
Don't delete anything from the old app first. Turn on the import, check that the dates show up on the new calendar, and only then clean up. If your old app never wrote to Health, there is nothing to import, and you will need to enter dates by hand or use a CSV where the app allows it.
Features change, so check the current listing or help page of the app you are moving to.
Which one to pick
- If you want to move a spreadsheet or a lot of history in one go, pick Period.
- If you want a two-way sync with Health and more data types, pick Natural Cycles.
- If your history only exists in Clue, expect to re-enter it, since Clue does not import.
- If what you want is daily notes your doctor can read, with no account and data kept on the phone, pick Tideline. Its Health import is only for period dates, so it is a smaller feature than the other two. See how it compares with other doctor-report apps and what a private tracker means.
Keep the record your doctor needs. Tideline is a period and mood tracker for iPhone: write one sentence a day, and after two cycles it puts the week before your period next to the week after it starts. Free to track, no account.
Get Tideline on the App Store
Keep reading
- Private period tracker, no account
- Period Apps That Make a Doctor Report: Clue, Me v PMDD, PMDD Tracker and Tideline Compared
- Flo Alternative for PMDD and Privacy
Sources
- Apple App Store: Tideline Period & PMDD Tracker
- Apple App Store: Period - period tracker
- Clue: Can I export my data from Clue to Apple Health or Apple Health to Clue?
- Clue: Can I import my data to the Clue app?
- Natural Cycles: How to sync with Apple Health