Rhoe Privacy Policy
Effective date: 20 October 2026
Rhoe is a period and cycle tracking app for iPhone and Android. This policy explains what information Rhoe handles, where it is kept, and the choices you have.
In short: Rhoe has no accounts, no servers, no analytics and no advertising. Everything you enter stays on your phone, encrypted. We, the publisher, never receive, see, sell or share your data.
1. Who we are
Rhoe is published by Konstantinos Tsirakos, an individual developer based in Greece (“we”, “us”). For any question about this policy or your privacy, contact:
Email: ktsirakos@hotmail.com
Because Rhoe does not send your information to us, we do not act as a “controller” of the health information you enter in the app. You alone control it, on your own device.
Rhoe works only with what you choose to enter. Depending on how you use it, this can include:
- Cycle information: period start and end dates, flow, symptoms, pain and mood on a given day.
- Daily check-ins (optional, off by default): how low, irritable, anxious or overwhelmed you felt, on a simple scale.
- About you (every item is optional): an age range, your typical cycle and period length, the birth control you use, conditions or life stages that affect your cycle (for example PCOS, endometriosis, postpartum, perimenopause, coming off birth control or irregular cycles), your goal (for example tracking, avoiding pregnancy or trying to conceive), and the period products you use.
- Settings: a first name for the greeting on the home screen (optional), appearance and reminder preferences, and the date of your last backup.
Some of this is health information, which the law treats as especially sensitive. That is why Rhoe is designed so it never leaves your device unless you decide to move it.
- On your device only. Rhoe stores your information in the app’s private storage on your phone.
- Encrypted. Your data is encrypted with AES-256-GCM. The encryption key is held in your phone’s secure key storage (the iOS Keychain or the Android Keystore).
- Device backups. If you back up your iPhone to iCloud or to a computer with encrypted backups, your encrypted Rhoe data and its key are included in that backup so Rhoe can be restored on a new iPhone. These backups are handled by Apple under Apple’s privacy policy, and we have no access to them. On Android the key is not included in system backups, so Rhoe data is not readable from an Android system backup.
- No servers. Rhoe has no servers of its own and makes no network connections to send your information anywhere. We cannot see, recover or delete your data for you, because we never have it.
4. Device permissions
Rhoe asks for a permission only when you turn on the feature that needs it. You can withdraw any permission at any time in your phone’s settings.
- Notifications (optional): used to remind you to restock period products before your next predicted period. Reminders are scheduled on your device. Rhoe does not use push notification services, and no notification content passes through us.
- Calendar (optional, off by default): when you turn on the calendar forecast, Rhoe reads your upcoming calendar events (titles and dates) to show when plans overlap with your predicted period. Rhoe never creates, changes or deletes events. Event details are used on your device to draw the forecast. Rhoe saves only internal identifiers of events you choose to star, so it can remember them. Calendar information is never sent anywhere.
- Files (only when you use backup and restore): used to save a backup file where you choose, or to open one you pick.
5. Backups and sharing you start yourself
Rhoe never shares anything by itself. Information leaves your device only when you deliberately do one of the following:
- Backup files. You can export a backup of all your Rhoe data. It is locked with a password you choose (PBKDF2-SHA256 and AES-256-GCM encryption). We never see or store this password. If you lose it, the backup cannot be opened by anyone, including us. Where you save the file (for example iCloud Drive, Google Drive or email) is your choice, and that service’s own privacy policy applies.
- Check-in summary. You can share a text summary of your check-ins, for example with a healthcare professional, using your phone’s share sheet. You choose the recipient and the app that sends it.
6. What we do not do
- We do not require or offer an account or sign-in.
- We do not use analytics, tracking, advertising or profiling tools, and we do not use your data to train any model.
- We do not track you across other apps or websites.
- We do not sell, rent, share or otherwise disclose your personal information or health data to anyone.
- We do not collect your location, contacts, photos or device identifiers.
7. Apple and Google
You download and pay for Rhoe through the Apple App Store or Google Play. Apple and Google process your account, purchase and download information under their own privacy policies, and act independently of us. If you have agreed in your phone’s settings to share diagnostics with app developers, Apple or Google may give us anonymous crash reports and usage statistics, which do not include the information you enter in Rhoe. You can turn this off in your phone’s settings at any time.
8. Your rights and choices
Because your information is only on your device, you exercise your rights directly in the app:
- See and correct: view and edit everything you have entered at any time.
- Delete: remove individual entries, or use Delete all data in the You screen to remove your periods, logs, check-ins and profile. To remove everything, including your name and settings, uninstall Rhoe. Uninstalling also deletes its data from the device. Copies in your phone’s system backups or in backup files you exported stay where you saved them until you delete them.
- Take it with you: export a password-locked backup file at any time.
- Withdraw permissions: turn notifications or calendar access off in the app or in your phone’s settings.
If you live in the European Economic Area, the UK or another place with data protection laws, you have rights such as access, correction, deletion, portability and objection. Since we hold no personal data about you, we usually will not have anything to give or delete, but you can always contact us with questions. You also have the right to complain to a data protection authority. In Greece, this is the Hellenic Data Protection Authority (www.dpa.gr). If you live elsewhere, you can contact your local authority.
For residents of US states with consumer health data laws (such as Washington, Nevada and Connecticut): we do not collect, share or sell consumer health data. Health information you enter in Rhoe stays on your device under your control.
9. Children
Rhoe is not intended for children under 13, and we do not knowingly allow them to use it. If you are under the age at which you can consent to the use of apps in your country (for example 15 in Greece or 16 in some EU countries), please use Rhoe only with a parent’s or guardian’s permission. Because Rhoe collects nothing, we hold no information about any user, including children.
10. Security
Your data is encrypted on your device, and its key is kept in your phone’s secure key storage. Keep your phone protected with a passcode, Face ID, Touch ID or fingerprint lock, because anyone who can unlock your phone can open Rhoe. Choose a strong password for any backup file and store it safely.
11. Changes to this policy
If a future version of Rhoe changes how information is handled, for example by adding an optional online feature, we will update this policy before that version is released and change the effective date above. If a change is significant, we will also tell you in the app. We will never start collecting your health data without asking you first.
Questions, requests or concerns:
Konstantinos Tsirakos, Greece
Email: ktsirakos@hotmail.com