On Monday we covered the Dutch regulator's warning that period apps may share your health data with advertisers. Euki is the opposite. It's a free reproductive-health app built by Women Help Women, a nonprofit, and it's designed so there's nothing to share.
What makes it different
Euki collects no personal information. Everything you enter, your cycle, symptoms, and sex life, stays stored locally on your phone and is never sent to a company's server. No account, no email, no cloud. It's free, in English and Spanish, on iOS and Android. Mozilla's Privacy Not Included review gave it a "Best Of" rating and flagged it "not creepy," a bar most apps miss.
The privacy features
A decoy screen. If someone makes you open Euki, type 0000 and it shows a fake screen instead of your data.
A customizable dashboard. Hide sensitive sections and show only what you want.
A PIN lock. Because Euki isn't tied to your email, there's no PIN recovery, so pick one you'll remember.
Automatic data deletion. Set it to wipe your entries on a schedule.
The honest caveats
Euki keeps your data private, but your phone is still the weak point. Set a phone passcode and the app PIN. Euki also links out to external resources, and those third parties have their own policies, so don't assume they're as private as Euki is.
If the stakes are higher
Reproductive-health data can be sought by law enforcement in some states. The EFF recommends keeping it separate from your everyday digital life: use a hardened browser (Brave, Firefox, or DuckDuckGo) with history off, turn off your phone's ad identifier, lock your phone with a passcode instead of Face ID or fingerprint when it matters, and use Signal for sensitive conversations.
Up next · Friday
Still on Flo? We'll walk through locking it down with Anonymous Mode, or deleting your data for good — step by step.