Euki

A period tracker: log your cycle and sexual health, with your entries kept on your phone.

Quick facts

Free version
Doesn't sell your data
Data not used for ads
Data stays on your device
No account needed
Delete your account in the app

From Euki's own pages, checked Nov 12, 2026. See the sources

What is Euki?

Euki pairs a period tracker with a library of sexual and reproductive health information 🌸 Log bleeding and symptoms like cramps, acne and headaches on a calendar you can customise, and after about two months you'll see a cycle summary and predicted periods. You can read up on contraception, abortion, miscarriage and STIs, with quizzes and personal stories, and use the Care Navigator to find providers and support. Your entries stay on your phone, with an optional PIN and manual or scheduled deletion 🔒 It's free, in English and Spanish, and run by a US nonprofit.

Screenshots

Screenshots from the App Store.

Who Euki is for

People who want to track their cycle and look up sexual and reproductive health information; the nonprofit says it builds for people facing barriers to care.

What Euki does

Period and symptom tracking on a customisable calendar
Period predictions and a cycle summary after about two months
Appointment and medication reminders
Information on contraception, abortion, miscarriage and STIs, with quizzes and stories
Care Navigator for finding providers and support organisations
Entries stay on your phone, with an optional PIN lock
Delete your data manually or on a schedule
Available in English and Spanish

Euki pricing

Prices change and differ by country. Each line shows where and when we read it.

Free version

There is a free version.

The site describes the whole app as free to use.

“That’s why Euki is 100% free to use. You won’t find paywalls here.”

Source: eukiapp.org · checked Nov 12, 2026

See all: Free period trackers (10)

Euki privacy: what the company says about your data

Taken from Euki's own published pages, with the exact passage each line rests on. This is a summary of what the company states, not an audit of what it does.

Selling personal data

Says it does not sell personal data.

Stated in Euki's Privacy FAQs.

“Euki does not have any of your app data to share or sell, and even if we did—we wouldn’t!”

Source: eukiapp.org · checked Nov 12, 2026

See all: Period trackers that say they don't sell data (8)

Advertising

Says it does not use or share personal data for advertising.

“The App does not track its users to provide targeted advertising and, therefore, does not respond to Do Not Track signals.”

Source: eukiapp.org · checked Nov 12, 2026

Account

You can use it without creating an account.

An optional PIN can be set; the policy says it is not recorded by the app.

“You do not need to register to use the App.”

Source: eukiapp.org · checked Nov 12, 2026

Where your data is kept

Your data is kept on your device.

“Any health data that you provide to the App stays on the device that you install the App on.”

Source: eukiapp.org · checked Nov 12, 2026

See all: On-device period trackers (5)

Deleting your data

You can delete your data or account from inside the app.

“You can delete this data through the in-app settings or by uninstalling the app.”

Source: eukiapp.org · checked Nov 12, 2026

Company based in

United States

Euki, Inc., described on its site as a U.S. nonprofit.

“Euki is a U.S. nonprofit:”

Source: eukiapp.org · checked Nov 12, 2026

See how every listed app answers these questions in our app privacy data, or put Euki side by side with another app in the app privacy checker.

Compiled from public sources

HerFound added this listing from public information. Facts aren't founder-confirmed yet. We don't publish ratings of our own; a star rating shown here is Apple's, linked to the App Store. Spotted something wrong? Tell us and we'll fix it. How HerFound compiles listings.

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Euki: common questions

There is a free version. Source: eukiapp.org, checked Nov 12, 2026.

Euki says it does not sell personal data. Stated in Euki's Privacy FAQs. On advertising, it says it does not use or share personal data for advertising. Source: eukiapp.org, checked Nov 12, 2026.

You can use it without creating an account. Source: eukiapp.org, checked Nov 12, 2026.

Your data is kept on your device. Source: eukiapp.org, checked Nov 12, 2026.

You can delete your data or account from inside the app. Source: eukiapp.org, checked Nov 12, 2026.

Euki is available on iOS and Android.