What are the best period trackers that keep data on your device?

HerFound lists 5 period trackers that keep data on your device: Cycles, Euki, Glow, Read Your Body and drip. 2 of 5 have a free version (Euki and Glow). Euki, Read Your Body and drip say outright that they do not sell personal data. Each fact below comes from the app's own pages, last checked Nov 12, 2026.

Updated . How an app gets on this list: Apps whose own pages say tracked data stays on the device, or that offer a mode that keeps it there. We don't rank by rating or popularity and we don't publish ratings; sponsored listings are labelled.

Period Trackers That Keep Data on Your Device compared

  • Cycles
    Free version
    —
    Paid plan
    $2.99 to $59.99
    Sells your data?
    —
    Data used for ads?
    Yes
    Account
    Optional
    Data kept
    Device option
    Platforms
    iOS
  • Euki
    Free version
    Yes
    Paid plan
    —
    Sells your data?
    No
    Data used for ads?
    No
    Account
    Not needed
    Data kept
    On your device
    Platforms
    iOS, Android
  • Glow
    Free version
    Yes
    Paid plan
    $59.99/year, $29.99 every 3 months or $99.99 lifetime
    Sells your data?
    Not for money
    Data used for ads?
    Yes
    Account
    —
    Data kept
    Device option
    Platforms
    iOS, Android
  • Read Your Body
    Free version
    Trial only
    Paid plan
    $2.69/month or $20.99/year
    Sells your data?
    No
    Data used for ads?
    —
    Account
    Optional
    Data kept
    Device option
    Platforms
    iOS, Android
  • drip
    Free version
    —
    Paid plan
    —
    Sells your data?
    No
    Data used for ads?
    No
    Account
    —
    Data kept
    On your device
    Platforms
    iOS, Android

Sources: each app's own privacy policy, help pages and US App Store listing. Open an app to read the exact passage and the date we checked it. “—” means we have not sourced that fact yet. This is what each company states, not an audit of what it does.

All 5 apps

Cycles logo

Cycles

A period tracker for iPhone: predict your periods and fertile days and share your cycle phases with a partner.

Cycle & HealthFreemium
Euki logo

Euki

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

Cycle & HealthFree
Glow logo

Glow

A fertility and ovulation tracker: period forecasts, partner sharing and community forums

Cycle & HealthFreemium
Read Your Body logo

Read Your Body

A cycle charting app: customisable period tracking and fertility awareness charting.

Cycle & HealthSubscription
drip logo

drip

An open-source period tracker: log your cycle and practise fertility awareness, with data kept on your phone.

Cycle & HealthFree

Common questions

Euki and Glow have a free version. Read Your Body needs a paid plan beyond any free trial.

Euki, Read Your Body and drip say they do not sell personal data. Glow says it does not sell it for money; see each listing for what the policy adds about advertising. This is what each company states in its own policy, not an audit.

Cycles, Euki and Read Your Body can be used without creating an account, according to their own pages.

Euki, Glow, Read Your Body and drip are on Android. Cycles is not.

Alternatives

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