Choosing an app
Seventh vs Clue: which period tracker is right for you?
Choose Seventh if you want tracking, pregnancy mode and a doctor summary free, without making an account. Choose Clue if you need Android, another language, wearable sync, or its Conceive and Perimenopause modes. Seventh is new, coming soon, and can import your Clue history. Facts about Clue were checked on 28 October 2026.
The short version
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| Seventh | Clue | |
|---|---|---|
| Main focus | Free all-in-one cycle and women’s health tracking, private by design | Cycle tracking, with paid Clue Plus modes for conceiving, pregnancy and perimenopause |
| Price | Free. No ads, no subscription | Free version, plus Clue Plus ($9.99 a month or $39.99 a year on the US App Store) |
| Account to start | Not needed | A free account is required |
| Where your data lives | On your phone; optional backup if you sign in | Clue’s servers in Ireland and Germany |
| Next period shown as | A range of likely dates | Predicted period days in the calendar |
| Pregnancy | Free pregnancy mode | Premium pregnancy features in Clue Plus |
| Doctor summary | Free one-page PDF | In Clue Plus, or a one-off purchase |
| Export | Self-serve file | Self-serve JSON file |
| Import from other apps | From Clue, Flo, Apple Health, CSV or JSON | Not offered, per Clue’s help centre |
| Devices | iPhone and iPad (iOS 26 or later) | iPhone, Android, web |
| Status | Coming soon | On the App Store, rated 4.8 from about 407,000 ratings (US) |
Price: what’s free?
Seventh is free: predictions, logging, reminders, insights, pregnancy mode, the library and the doctor summary, with no ads.
Clue says its free version “will always be available”. Clue Plus adds predictions up to 12 months ahead, cramps predictions, full articles, extra charts, Conceive mode, Perimenopause mode, premium pregnancy features, wearable integrations and sharing your cycle with someone. On the US App Store, Clue Plus is $9.99 a month or $39.99 a year. Prices vary by region.
Paid in Clue Plus, free in Seventh
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| What Clue Plus includes | In Seventh |
|---|---|
| Cycle analysis charts | Free: insights on your cycle and period length, regularity, and symptom patterns by phase |
| Doctor’s Report (Clue Plus or a one-off purchase) | Free: a one-page doctor summary (PDF) |
| Premium pregnancy features | Free: pregnancy mode with weeks, due date, trimester and weekly notes |
| Sharing your cycle with someone (Clue Connect) | Free: share your phase and period window with one person |
| Conceive mode | Partly: a free fertile-window estimate, refined by temperature and ovulation tests, but no dedicated mode |
| Perimenopause mode | Not in Seventh |
| Wearable integrations | Not in Seventh |
| Unlimited custom tags | Not in Seventh |
Do you need an account?
Seventh works without an account. What you log stays on your phone, and signing in is optional, for a backup that moves with you to a new phone.
Clue needs a free account to start. Its help centre says it made that choice in 2019, so your data is stored on its servers rather than on your device.
Where your data lives
Clue stores data on Amazon Web Services servers in Ireland and Germany, and is based in Berlin under European privacy law. Its App Store privacy label lists identifiers as “Data Used to Track You”.
Seventh keeps your logs on your phone. There are no ads and no third-party analytics, advertising or tracking code in the app.
Predictions
Both apps learn from your own cycles. Clue uses up to your last 12 cycles and marks predicted period days in pink in its calendar.
Seventh shows your next period as a range, like “likely Nov 4–10”, and the range tightens as you log. If you tell Seventh your cycles are irregular, or that you have PCOS, the window widens to match.
Moving from Clue
Clue lets you download your data as a JSON file from its settings. Seventh can import that file, so your past periods come with you. It also takes history from Flo, Apple Health, or a CSV or JSON file. See how to move from Clue to Seventh.
Where Clue is stronger
Clue is on Android and the web, works in 27 languages, syncs with wearables like Oura and Apple Watch in Clue Plus, and has dedicated modes for trying to conceive, perimenopause and people who don’t bleed. It also lets you share your cycle with more than one person. If you need any of those, Clue is the better fit today.
How Seventh handles your data
Seventh never sells your data, shows no ads, and has no third-party trackers or advertising SDKs. It works without an account; if you sign in, your cycle is backed up to our servers so it can be restored. Seventh counts app usage itself, without any health values. Every detail is in Seventh’s privacy policy.
Frequently asked questions
Is Seventh really free?
Yes. Everything you need to track your cycle is free, with no ads and no subscription.
Will I lose my Clue history if I switch?
No. Download your data from Clue and import it into Seventh. Keep your Clue file somewhere safe as well.
Is Seventh on Android?
Not yet. Seventh is for iPhone and iPad on iOS 26 or later.
Can I use either app as contraception?
No. Seventh isn’t a medical device or a form of birth control.
Sources
- Clue Help Center: Using Clue for free
- Clue Help Center: What’s included in Clue Plus
- Clue Help Center: Why do I need a Clue account
- Clue Help Center: Where is my data stored
- Clue Help Center: How are my predictions and averages calculated
- Clue Help Center: What is the Doctor’s Report
- Clue Help Center: How do I get a copy of my Clue data
- Clue Help Center: Can I import my data to the Clue app
- Clue on the App Store (US)
Seventh is a free period and cycle tracker for iPhone and iPad, by doogud. This article is general information, not medical advice. If something feels wrong, see a doctor.
