Consumer health data privacy policy
Last updated 3 October 2026
The short version. Washington's My Health My Data Act, and similar laws in Nevada and Connecticut, ask health apps to publish this page. What you log in Tideline stays on your phone and is never sent to us. Five things can leave the phone, and they are all listed here: your subscription status, through Apple and RevenueCat; a message, if you choose to send us one from the app; the app's check for updates; from version 1.0.7, how far setup got; and, from October 2026 and outside the EU, the UK and Switzerland, which Apple Ads campaign led to the install. Because Tideline is an app about PMS and PMDD, we treat the first three as consumer health data. The fourth is the name of a setup screen and the fifth the name of an ad campaign; neither says anything about your health. This page applies to everyone who uses Tideline, wherever you live.
What we collect, and why
What you log. Your entries, symptoms, what you wrote or said, period days, cycle settings, the answers you gave when you set the app up, and any period dates you import from Apple Health. The app keeps and uses these only on your iPhone, to show you your record, reminders and reports. None of it is sent to us or to anyone else, and we have no copy.
Your subscription status. A random identifier made for this purpose, your app and iOS version, the country of your App Store account and the IP address of the request; if you buy, which product, when, and the price and currency; and, if you answered the optional question at the end of setup, where you heard of Tideline. We use it to provide the subscription you asked for: to know whether Plus is paid for, and to see totals such as how many trials began. We do not use it for anything else.
Messages you send from the app. Only when you tap Send on the feedback screen: what you typed there, the kind of message you picked, your app and iOS version, the same random identifier as your subscription status, and the IP address of the request. We use it to improve the app, and to answer you if you gave an address. It never includes anything you log.
The check for updates. When the app opens it asks whether newer app code is available. The request carries your iOS and app version, a random identifier made for this installation, and the IP address it came from. We use it to deliver fixes between App Store versions.
How far setup got. From version 1.0.7, during the first setup only: the name of the furthest setup screen you reached, for example “cycle length”, with the same random identifier as your subscription status. Never what you answered on a screen, and nothing once setup has ended. It is not health information, and we list it here because it leaves the phone. We use it to see where setup is too long. A phone whose App Store account is in the European Economic Area, the United Kingdom or Switzerland does not send it.
Emails you send us. Your address and what you wrote, used to answer you.
Where it comes from
- from you, in the app on your phone
- from Apple Health, on your phone, only if you choose to import your period dates
- from the App Store, through Apple and RevenueCat, when the app checks or starts a subscription
- from you, when you send a message from the app or write to us
What we share, and with whom
We share what is described above with two processors. Your subscription status, how far setup got and the messages you send from the app go to RevenueCat, Inc. (United States), which checks subscriptions for us under a data processing agreement. The check for updates goes to Expo (650 Industries, Inc., United States), which delivers the app's updates. We have no affiliates.
We do not share, sell or buy anything you log. We do not use consumer health data for advertising, and the app contains no advertising or tracking code.
A partner link, a report or an export goes only where you send it yourself, from your phone. None of them passes through us.
Your rights, and how to use them
You can ask us to confirm whether we collect or share your consumer health data, to give you a copy of it, to tell you who we shared it with, to withdraw any consent, and to delete it.
- What you log is already in your hands: the export in the app is free, and You → Delete everything erases it from the phone at once.
- Your subscription record: email [email protected] with the order number from Apple's receipt, so we can find it without asking for anything else. We act on it and have RevenueCat delete it.
- A message you sent from the app: email us what it said and roughly when you sent it. We delete it at RevenueCat.
We answer within 45 days, at no charge. If we need longer, we tell you why within those 45 days.
Appeals. If we decline a request, reply to our answer and say that you are appealing. We answer the appeal in writing within 45 days. If we still decline, you can complain to the Washington State Office of the Attorney General at atg.wa.gov, or to the attorney general of the state where you live.
Changes
If this policy changes, this page and its date change with it. Tideline will not start collecting or sharing another kind of consumer health data without asking you first.