Euki App Alternative: Period Tracking With Cross-Device Sync

Euki Gets the Architecture Right

Euki is a genuinely private period tracker. It is open source, stores data on your device with no server transmission, and requires no account. The Women’s Reproductive Rights Assistance Project developed it specifically for users who need strong privacy protection. If your only requirement is that your period data never reaches a company server, Euki delivers that.

There is no documented history of data sharing or enforcement action against Euki. The privacy guarantee is architectural: the data lives on your phone, period.

Where the Gap Shows Up

The limitation is not privacy — it is practicality. Euki has no cross-device sync. If you upgrade your phone, switch from Android to iOS, or want to access your cycle data on a tablet, you cannot. Data is stranded on the device where it was entered.

Euki is maintained by a nonprofit, which means development resources are limited and feature updates come less frequently than commercially-maintained apps. The symptom tracking set is narrower than commercial alternatives.

For users who track on a single device and don’t anticipate switching platforms, these limitations may be acceptable. For users who want on-device privacy without those constraints, the gap is real.

How Floriva Compares

Floriva and Euki share the same core architecture: data on your device, no account required to start tracking, nothing transmitted to our servers. The difference is that Floriva adds cross-device encrypted sync for users who need it — only encrypted data moves between devices, and we cannot read it — along with a commercially-maintained feature set and regular updates. If you’ve been using Euki and hit the sync wall, Floriva is the closest equivalent that solves it without abandoning the privacy model.