comparisons

Euki vs Clue: On-Device Privacy vs GDPR Server Tracker

Euki is free, on-device, and requires no account. Clue is GDPR-compliant and feature-rich but stores data server-side. Here's what that difference means.

The core choice: architecture vs features Euki and Clue represent different answers to the question of what "private period tracker" means. Euki answers it architecturally: no data leaves your device, no account is required, there is nothing to hand over. The privacy is enforced by what the app doesn't do. Clue answers it through policy: GDPR compliance, transparent data practices, no ad supported model, no documented enforcement history. The privacy is enforced by what the company has committed not to do. Both approaches have real value. The difference matters when the threat model is legal compulsion rather than commercial data misuse. What on device storage actually prevents When Euki stores your period data on your device, a court order served on Euki produces nothing. Euki doesn't have your data. This is the structural advantage of on device architecture. With Clue, a court order served on Clue could compel them to produce your data. GDPR provides protections for EU based legal requests. US legal requests, depending on jurisdiction and data sharing arrangements, may or may not be subject to those protections. The data exists; the question is whether it can be compelled. In sta