5 best private, offline period tracker apps (checked Oct 2026)

By the All Things AI team Updated

Method: prices, account rules, offline support and data storage checked on each developer's own pages in October 2026, with sources linked under each pick. No affiliate links; nobody paid to be listed. How we checked

Short answer

drip. and Euki are free, open source and keep your data on your phone with no account; Euki adds a PIN and scheduled deletion. Apple Health's Cycle Tracking is built into the iPhone and Apple Watch. QuietCycle and Ember Log are our on-device trackers, free to try in the browser.

Compare at a glance

5 best private, offline period tracker apps (checked Oct 2026): comparison table
App Best for Price Account needed Works offline Where data lives Platforms Status
drip. Open-source tracking that never leaves your phone Free Not required Yes On device iPhone, Android Available now
Euki Anonymous tracking with PIN and auto-delete Free (donation-funded) Not required Yes On device iPhone, Android, Mac Available now
Apple Health Cycle Tracking iPhone and Apple Watch owners Free (built into iPhone and Apple Watch) Not required Yes On device + optional iCloud iPhone, iPad, Apple Watch Available now
QuietCycle Cycle and fertility logging with no network Free (browser version) Not required Yes In your browser, on this device Web Community proposal — try in browser
Ember Log Perimenopause and menopause symptoms Free (browser version) Not required Yes In your browser, on this device Web Community proposal — try in browser

Scroll the table sideways on a phone. Third-party facts checked October 2026; prices can change, so confirm on the developer's site before you pay.

About “community proposal”: this is a community proposal. We build the iPhone/Android app once it reaches 100 upvotes. You can try the browser version free, with no sign-in; upvoting takes a Google sign-in.

  1. drip.

    Available now Other developer

    Open-source tracking that never leaves your phone

    drip. is open source, available on Google Play, F-Droid and the App Store, and its App Store privacy label states that no data is collected.

    Price
    Free
    Account
    Not required
    Offline
    Yes
    Data
    On device
    Visit drip. ↗

    Source: dripapp.org/ · apps.apple.com/us/app/drip-period-cycle-tracker/i… · checked Oct 2026

  2. Euki

    Available now Other developer

    Anonymous tracking with PIN and auto-delete

    Run by an independent 501(c)(3) nonprofit, Euki is open source, needs no email or phone number, and lets you set a PIN or schedule automatic deletion of sensitive data.

    Price
    Free (donation-funded)
    Account
    Not required
    Offline
    Yes
    Data
    On device
    Visit Euki ↗

    Source: apps.apple.com/us/app/euki/id1469213846 · eukiapp.org/features · checked Oct 2026

  3. Apple Health Cycle Tracking

    Available now Other developer

    iPhone and Apple Watch owners

    On Apple Watch Series 8 or later and Ultra models, wrist temperature adds after-the-fact ovulation estimates in supported regions; Apple says it should not be used as birth control.

    Price
    Free (built into iPhone and Apple Watch)
    Account
    Not required
    Offline
    Yes
    Data
    On device + optional iCloud (end-to-end encrypted with two-factor authentication)
    Visit Apple Health Cycle Tracking ↗

    Source: support.apple.com/en-us/120356 · www.apple.com/health/ · checked Oct 2026

  4. QuietCycle

    Community proposal — try in browser By All Things AI

    Cycle tracking that can't leak.

    Price
    Free (browser version)
    Account
    Not required
    Offline
    Yes
    Data
    In your browser, on this device
    Try QuietCycle free in your browser App page and upvotes

  5. Ember Log

    Community proposal — try in browser By All Things AI

    Private menopause tracker

    Price
    Free (browser version)
    Account
    Not required
    Offline
    Yes
    Data
    In your browser, on this device
    Try Ember Log free in your browser App page and upvotes

How to choose a private period tracker

After the FTC's action against Flo for sharing cycle data with Facebook and Google, "private" cannot mean a toggle inside a cloud app. Four things tell you whether a tracker is actually private:

  1. 1. Can the app send data at all?

    The strongest guarantee is structural: an app with no network capability physically cannot transmit your cycle. QuietCycle ships that way. Anything that syncs to an account is only as private as the company's policy this year.

  2. 2. Is there an account?

    An account is a record of you on someone's server, even if the cycle data is encrypted. A tracker that needs no sign-up has nothing to subpoena and nothing to breach.

  3. 3. Is it locked on the phone?

    Private from the internet is not the same as private from whoever picks up your phone. Look for Face ID or a passcode on the app itself. A tracker that also lets you export or delete everything in one tap is a good sign that privacy was designed in rather than added later.

  4. 4. Does it cover your stage?

    Cycle and fertility logging is one job; perimenopause and menopause symptom tracking is another, with different symptoms and a different doctor's summary. Pick the app built for the stage you are in rather than the one with the longest feature list.

The longer answer

After Flo's FTC settlement over sharing cycle and fertility data with Facebook and Google, "private" period tracking can't just mean an anonymous mode bolted onto a cloud app. These two trackers are built the opposite way: your data never leaves the iPhone, and there's no account to leak. QuietCycle handles cycle and fertility logging and ships with no network capability at all, so it physically cannot transmit your data; Ember Log covers the perimenopause and menopause side, logging hot flashes and 100+ symptoms behind Face ID and generating a one-page doctor-visit summary entirely on-device. Pick the one that matches the stage you're tracking.

How we checked

FAQ

Are these period trackers really private?

Yes. Both store everything only on your device with no account and no cloud. QuietCycle goes furthest: it ships with no network entitlement at all, so it physically cannot transmit your data anywhere. Ember Log keeps your symptom history on-device and locks it behind Face ID.

Do they work offline?

Completely. Neither app needs an internet connection to log or review your data. QuietCycle has no network capability whatsoever, and Ember Log is fully offline by design, so both work on a plane or with Wi-Fi off.

Are they free, and is there a subscription?

There's no subscription on either app. Both are currently free to try in TestFlight beta. Ember Log is designed as a one-time unlock rather than a recurring fee, unlike menopause apps such as Caria that charge monthly.

Which one should I use?

Use QuietCycle if you're tracking your menstrual cycle and fertility, with optional local-only HealthKit integration. Use Ember Log if you're in perimenopause or menopause and want to log hot flashes, mood, sleep, brain fog and other symptoms, then export a clean summary for your doctor.

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