Seventh vs Flo vs Clue: period trackers compared

Seventh is free with no subscription and no account, and shows your next period as a range of dates. Flo and Clue have free versions with paid tiers, Flo Premium and Clue Plus, and are on Android in many languages. Seventh is coming soon for iPhone and iPad. Facts were checked on 28 October 2026.

The table

	Seventh	Flo	Clue
Main focus	Free all-in-one cycle and women’s health tracking, private by design	An “AI-powered health app”, with a paid Premium tier	Cycle tracking, with paid Clue Plus modes
Price	Free. No ads, no subscription	Free version; Flo Premium (weekly, monthly or yearly)	Free version; Clue Plus, $9.99 a month or $39.99 a year (US)
Account to start	Not needed	Set up in onboarding; can be skipped, with limits; Anonymous Mode	Required
Where data lives	On your phone; optional backup	Flo’s servers (Amazon Web Services)	Clue’s servers in Ireland and Germany
App Store “Data Used to Track You”	No third-party tracking code (label published at launch)	Purchases, location, identifiers, usage data	Identifiers
Next period shown as	A range of dates	Countdown and predicted days	Predicted days
Irregular cycles and PCOS	Free setting widens the window	Premium Symptom Checker (not in UK or EU)	No PCOS-specific feature found
Fertile window	Free estimate, refined by temperature and tests	Free predictions	Conceive mode in Clue Plus
Pregnancy	Free mode	Separate in-app pregnancy purchases listed	Premium features in Clue Plus
Doctor summary	Free PDF	Premium (iOS)	Clue Plus or one-off purchase
Export	Self-serve file	On request (TXT or JSON)	Self-serve JSON
Import	From Clue, Flo, Apple Health, CSV/JSON	Not documented	Not offered
Sharing	Free	Free basics in Flo for Partners	Sharing needs Clue Plus
Devices	iPhone, iPad	iPhone, Apple Watch, Android	iPhone, Android, web
Languages	English	21	27
US App Store rating	Not yet released	4.7 (about 2 million)	4.8 (about 407,000)

What the table means

If price matters most, Seventh keeps everything for tracking free, including the extras Flo and Clue charge for: the doctor summary, pregnancy mode and help with irregular cycles.

If privacy matters most, look at where your data lives and whether you need an account. Seventh stores your logs on your phone and works without one. Clue requires an account and keeps data on EU servers. Flo asks you to set up an account during onboarding, and offers Anonymous Mode.

If you need Android, Apple Watch, wearables or another language, Flo or Clue is the better fit today.

How we checked

We read each app’s own help centre, privacy policy and US App Store listing on 28 October 2026, and linked them below. Prices, ratings and privacy labels change, so check the listing before you decide. Claims about Seventh come from the app itself.

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

Which is the best free period tracker?

It depends on what you need. Seventh is free without a subscription. Flo and Clue have free versions, with more behind Flo Premium and Clue Plus.

Which period tracker doesn’t need an account?

Seventh works without one. Flo lets you skip registering, with limits. Clue needs an account.

Can I switch from Clue or Flo to Seventh?

Yes, from either. Download your data from Clue, or request a JSON export from Flo, then choose the file in Seventh under Settings, Bring your history. See how to move from Clue or from Flo.

Sources

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.