comparisons
Published by Floriva · Updated 2026-03-31 · How Floriva checks its guides
Euki vs Drip: Two Free Privacy-First Period Trackers
Both Euki and Drip use on-device storage with no accounts. Drip is Android-only and open source. Euki is nonprofit and cross-platform.
Euki and Drip are both free, both use on-device storage, and both require no account. Drip is Android-only and open source, meaning privacy claims can be independently verified. Euki is iOS and Android, developed by a reproductive health nonprofit. Neither is as feature-rich as paid alternatives. If you want cross-platform support and more features, Floriva is a paid app with no free tier.
Two Free Apps That Took Privacy Seriously
Euki and Drip arrived at on-device privacy from different directions. Euki was built by Ibis Reproductive Health, a nonprofit focused on reproductive health access. The app's design choices, no account, no server, no analytics, reflect the organization's specific concern for users in contexts where reproductive health data could be used against them in prosecutions.
Drip was built as an open source project. The design choice that matters most is transparency: the source code is publicly available on GitHub, which means the privacy claims can be verified by anyone with the technical ability to read code. Most period apps ask you to trust their privacy policy. Drip shows you the code.
The Open Source Advantage
Open source is the strongest form of privacy transparency available. When Drip claims it does not transmit any data to external servers, that claim can be verified in the codebase. When Flo claimed it did not share data with Facebook and Google, that was a policy promise that turned out to be contradicted by the behavior of embedded SDKs, the conduct that led to the $59.5M settlement.
The limitation of Drip's open source approach is platform: it is Android-only. There is no iOS version. For users who need iOS support, open source verification is not currently an option in a free tracker.
Nonprofit vs Open Source as Trust Models
Euki's trust basis is institutional. Ibis Reproductive Health has an organizational mission that conflicts with data monetization. The nonprofit is accountable to its mission, its funders, and the communities it serves, not to advertising revenue or investor returns. This creates a durable incentive structure against data misuse.
Drip's trust basis is technical. The code can be read. You do not have to trust the developers' intentions because you can verify the implementation. For technically literate users, this is a higher assurance than any policy or mission statement.
Feature Comparison
Both apps cover the core period tracking functions: cycle logging, prediction, and basic symptom tracking. Neither has the polished interface or feature depth of commercial apps like Flo or Clue. There are no community features, AI health insights, or detailed health reports.
For users who use a period tracker primarily to know when their period is coming and log basic symptoms, both Euki and Drip cover what matters. For users who relied on Flo's health insights, symptom correlation data, or community forums, the transition to either free app will involve meaningful feature loss.
Floriva sits between the free on-device apps and the commercial cloud apps: on-device storage and no account required, but with more feature depth than Euki or Drip and optional encrypted cross-device sync.
Cited signals
- Euki is free with no subscription, no ads, and no in-app purchases Ibis Reproductive Health (Euki developer)
- Drip is free and open source with no subscription or in-app purchases Drip app (open source, GitLab)
- Flo Health paid a $59.5M combined settlement for sharing reproductive health data without user consent, the case that drove many users toward free privacy-first alternatives Reuters / FTC, September 2025
Euki vs Drip vs Floriva: Free Privacy Tracker Comparison
| Feature | Floriva | Euki | Drip |
|---|---|---|---|
| Platform | iOS + Android | iOS + Android | Android only |
| On-device storage | Yes | Yes | Yes |
| Account required | No | No | No |
| Open source | No | No | Yes |
| Cross-device sync | Encrypted, opt-in | No | No |
| Price | Paid app (no free tier) | Free | Free |
| Developer type | Independent | Nonprofit | Community |
| Subpoenable | No | No | No |
Strengths and trade-offs
Floriva
Pros
- iOS and Android
- On-device storage with opt-in encrypted sync
- More complete feature set
Cons
- Paid subscription required (no free tier)
Euki
Pros
- Nonprofit developer, no commercial data incentive
- iOS and Android
- On-device storage
Cons
- Limited feature set
- No cross-device sync
- Less frequent updates
Drip
Pros
- Open source, independently verifiable
- No accounts or analytics of any kind
- Free
Cons
- Android only
- Minimal feature set
- No sync at all
What the experts say
Period tracker apps collect some of the most sensitive data imaginable, and most store it on servers that are vulnerable to law enforcement requests, breaches, and data broker resale.
Quick answers to the obvious questions.
Which is better for privacy, Euki or Drip?
Drip is technically more verifiable: it is open source, meaning anyone can inspect the code to confirm that no data leaves the device. Euki's privacy is based on trust in the nonprofit developer, which is a strong trust basis but not independently auditable in the same way. Both use on-device storage and neither requires an account. On the privacy question alone, Drip's open source model provides the highest assurance currently available in a free tracker.
Can I use Euki or Drip instead of Flo after the settlement?
Yes. Both Euki and Drip use on-device storage and require no account, which means neither has the server-side exposure that made Flo's data sharing possible. The trade-off is a less refined feature set and no cross-device sync. If you primarily use Flo for cycle prediction and symptom logging, both Euki and Drip cover those core functions.
Is Euki actually run by a nonprofit?
Yes. Euki is developed by Ibis Reproductive Health, a US-based nonprofit organization focused on reproductive health research and technology. Nonprofit structure means there is no investor or commercial pressure to monetize user data. This is a meaningful distinction from ad-funded or venture-backed period apps.
Is Euki safe for period tracking?
Euki stores all data locally on your device and does not require an account or internet connection to function. It has no ads and no documented data-selling history. Euki is backed by Ibis Reproductive Health, a nonprofit. The on-device architecture means there is no company server to subpoena. Euki is considered one of the most privacy-protective free period trackers available.
Is Drip period tracker open source?
Yes. Drip's source code is publicly available on GitHub, which means its data handling and storage practices can be audited by anyone. This transparency is a genuine privacy advantage. The trade-off is that Drip is Android-only and has a minimal feature set compared to more actively developed trackers.
What is the difference between Euki and Floriva?
Both Euki and Floriva store data on-device and require no account. Euki is free and backed by a nonprofit. Floriva is a paid app with no free tier and adds opt-in end-to-end encrypted cross-device sync, which Euki does not offer. If you use multiple devices or want to recover data after a phone loss, Floriva's sync feature provides that without compromising on-device privacy, your data is encrypted before it leaves your device.
Questions people ask before they switch.
Does Drip work on iPhone?
No. Drip is Android-only. If you need iOS support, Euki is the free on-device alternative. For iOS users who want more features and are willing to pay for a subscription, Floriva is on-device with iOS and Android support.
Can I sync Euki or Drip between devices?
No. Neither Euki nor Drip offers cross-device sync. Sync requires a server component, and both apps avoid server-side data by design. If you switch phones, you will need to re-enter your cycle history. Floriva offers opt-in encrypted sync that allows cross-device access without Floriva being able to read your data.
Can I use Euki without creating an account?
Yes. Euki requires no account and works entirely on-device. There is no registration process. You open the app and start tracking. All data stays on your phone.
What happens to my Euki data if I get a new phone?
Euki data is stored only on your device. If you get a new phone without exporting a backup, your data is lost. Euki does allow manual local backup export, but there is no automatic cloud sync. This is a meaningful limitation compared to cloud-based apps, and the reason Floriva added opt-in encrypted backup as a feature.