Mooneva Cycle is presented by its creator as a free, open-source period tracker that works without a centralized account or cloud database. The project’s reported approach keeps cycle records on the user’s device and uses React 19, TypeScript, Vite 6 and Capacitor 8 to target web, iOS and Android. That is a privacy-oriented design choice, not proof that every release or platform handles data securely: the project’s storage, network behavior and current builds have not been independently verified.
What “zero-cloud” means in this project
In an article published August 23, 2026, Mooneva Cycle’s creator describes an app that does not require email or phone registration and does not rely on a centralized service to store cycle history. The project says records stay on the device, using localStorage or secure storage, and says it includes no analytics, advertising SDKs or crash reporting. These are project claims, not independently audited properties of every version.
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The design goal is to reduce the amount of sensitive health information held by a remote service. If a service does not collect cycle histories, it cannot expose those histories through a breach of its central database. But local storage is not risk-free: someone with access to an unlocked device, an unprotected backup, or a vulnerable app or operating system may still access data. The exact protections also depend on how each platform build stores information.
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The creator names React 19 and TypeScript for the interface, Vite 6 for building the web app, and Capacitor 8 to connect the shared web-based interface to iOS and Android. The listed supporting tools include Tailwind CSS, i18next, html2pdf.js, Vitest and React Testing Library. These are versions and tools reported in the project article, not a check of the current codebase.
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Capacitor’s official React guide describes adding Capacitor to a web app, building its web assets, adding native iOS and Android projects, and calling native APIs from JavaScript. That explains the broad cross-platform approach: much of the interface can be shared while mobile-specific capabilities are accessed through native integrations. It does not establish that Mooneva Cycle currently builds successfully or is available in an app store.
How the project says it handles backups
Local-only storage creates a trade-off: users avoid handing their history to a cloud account, but they also need a way to preserve or move their own data. The creator describes encrypted backups that derive a key from a password using PBKDF2 and use AES-GCM authenticated encryption. The accompanying article specifies PBKDF2 with SHA-256 and 250,000 iterations for its sample implementation.
Those details describe the author’s stated design; they are not an independent security assessment or endorsement. Encryption depends on correct implementation and a sufficiently strong password, among other factors. The available account does not provide an independent review, threat model, or confirmation that the described code matches every shipping build. A user-managed encrypted export also means the user must retain both the backup file and the password needed to restore it; there is no account-based recovery described here.
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What features does the creator report?
The project article lists features intended to make local tracking practical across different users and workflows. Their presence and behavior in current released versions have not been independently checked.
- Cycle tracking and reminders: local notifications for predicted cycle or period starts, ovulation and fertile windows, symptom or mood logging, and contraceptive adherence.
- Discreet access: a discreet mode and PIN or biometric protection.
- Language and calendar support: 12 languages, right-to-left layouts and the Persian Jalaali solar calendar.
- Exports and imports: locally generated PDF summaries and imports from Flo, Clue and drip. Compatibility with current export formats is not established.
The creator says predictions use local calculations and rolling averages, including adjustments for irregular cycles. No clinical validation or prediction-performance study was identified. Cycle estimates and reminder dates should therefore be treated as app-generated estimates, not medical advice or evidence of fertility.
What users gain—and what they take on
Compared with an account-centered tracker, the project’s stated model shifts responsibility from a remote service to the device owner. The distinction matters most for recovery and portability.
| Question | Mooneva Cycle as described by its creator | Practical implication |
|---|---|---|
| Where is cycle history stored? | On the device, using localStorage or secure storage, according to the project. | Less dependence on a central history database; device access and local protections still matter. |
| Is an account required? | The project says no email or phone registration is needed. | There is no account-based route to recover history described in the source. |
| How are backups handled? | The creator describes password-derived encryption and user-managed backups. | Users need to keep the export and its password safe. |
| Can existing data be brought in? | The project reports imports from Flo, Clue and drip. | Actual support for a particular export file or current app version has not been verified. |
This is a comparison of the project’s stated design choices, not a systematic audit of other trackers. The privacy practices of any alternative need to be checked individually.
What is established, and what is not
The project article says Mooneva Cycle is free, open source under GPL-3.0, and has no paywalls on essential features. Those are creator-reported details. The article and its related DEV Community copy provide the project’s description; they do not substitute for checking a current repository, license file, release notes or app-store listing.
Best Value
Likewise, “zero-cloud” is best read as the project’s intended architecture rather than a verified guarantee about every data path. Establishing how a particular build behaves would require reviewing its source and dependencies, checking permissions and storage, and observing its network traffic. The source material does not report those checks, so it cannot substantiate an absolute claim that data never leaves the device or cannot be compromised.
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