Palavra Diária

Privacy Policy

Last updated: November 10, 2026

This Policy explains how Duo Dev ("we") handles the data of users of the Palavra Diária app (the "App"), in compliance with the Brazilian General Data Protection Law (Law No. 13,709/2018 — LGPD) and, where applicable, other data protection laws. In short: the App has no sign-up or login, does not send your reading data, markings and notes to any server of ours and keeps everything on your device. The only third parties that process data are Google AdMob (ads, in the free version) and Google Play (purchases).

1. Who is the data controller

Duo Dev (CNPJ 62.516.576/0001-63) is responsible for the App. On Google Play, Duo Dev appears as a developer under the name Duo Developer. For any privacy matter, write to contato@duo.dev.br.

2. What data we process and where it stays

• Data that stays only on your device (we do not receive it):
  • Reading: chapters read (with date and time), reading streak and grace day, achievements and progress, reading plans and completed days.
  • Markings: highlights (verse and color), favorites (verse and date) and free-text notes. Since you can type anything in the notes, they may contain personal or sensitive information.
  • App settings and the information that Premium is active.
  • Manual backup: if you export your data, the app creates a JSON file in the location you choose in the device storage. The app does not send that file anywhere.
• App permissions and what they are for:
  • Internet: used by Google Mobile Ads (ads) and Google Play Billing (purchases). It sends device identifiers to Google to serve ads; the purchase transaction goes through Google Play.
  • Receive device boot notice: reschedules the daily reminder after the device restarts. It does not record or send data.
  • Vibration: vibrates when the notification is shown. It does not record or send data.
  • Notifications: shows the daily reading reminder (local notification). It does not record or send data.
  • Exact alarms: schedules the reminder at the exact time you chose. It does not record or send data.
  • WhatsApp and Instagram check: the App only checks whether those apps are installed, to enable the share button. It does not access or open them without an action from you.
• Sharing a verse as an image: the image is handed to the app you choose through Android's sharing, which has its own policy.
• Data processed by third parties:
  • Google AdMob (free version only): displays ads and may process advertising identifier (Android Advertising ID), IP address, device data (model, system, language), ad interaction data, app usage data and diagnostics. See item 5.
  • Google Play (purchases): processes payment and subscription. We do not see card or payment data; we receive from Google Play only the confirmation that you are entitled to Premium.

We do not collect your location, your contacts, camera, microphone, list of installed apps (other than the WhatsApp and Instagram check described above), personal identification or browsing history. The App requires the permissions listed above.

3. What we use the data for

• Calculate the reading streak, show progress and unlock achievements (from the chapters read).
• Show your saved markings (highlights, favorites) and your notes linked to verses.
• Track the reading plan you chose and send the daily reminder you set up.
• Show ads in the free version and unlock Premium features for those who purchased.
• Ensure the operation and security of the App.

We do not sell your data.

4. Legal basis

We process data to perform the App usage contract and its purchases (art. 7, V, of the LGPD) and for our legitimate interest in keeping the service running (art. 7, IX). The use of the advertising identifier for personalized ads depends on your consent (art. 7, I), which you choose in the consent form and can change at any time (item 5). Where laws such as the GDPR apply, the same purposes rely on the equivalent bases (performance of a contract, legitimate interest and consent). Data that stays only on your device is not processed by us.

5. Ads and your consent

In the free version, the App shows ads in two formats: banner and interstitial (full screen), served by Google AdMob.

• Consent: the App requests Google's consent form (UMP), displayed as required by applicable law (for example, GDPR and LGPD). If you consent, Google may use interest data to personalize ads; if you do not, ads may continue, but without that personalization.
• [CONFIRMAR: "There is never an ad on sensitive screens (payment, forms, settings)."]
• [CONFIRMAR: "Where Google does not display a message, we show our own screen, with 'Accept' and 'Manage options' given equal prominence, and we store your choice on the device."]
• [CONFIRMAR: "Changing your mind: in Settings › Ad and privacy preferences."]
• [CONFIRMAR: "With no internet, no ad is loaded before consent."]
• [CONFIRMAR: "Those who subscribe to or buy Premium do not see ads and are not asked to consent; the ads SDK is not started."]
• To learn how Google uses data in ads and manage your preferences: policies.google.com/technologies/ads and adssettings.google.com. See also Google's privacy policy.

6. Purchases and subscriptions

Purchases (monthly, annual and lifetime Premium) are made through Google Play, which handles payment, renewal, cancellation and refunds. The App does not see card or bank account data: it only receives the purchase or restore confirmation and stores on the device the information that Premium is active. [CONFIRMAR: "The App also stores the plan type and checks again with Google Play whenever it is opened with internet."] We have no server of our own to validate purchases. See the Google Play Terms of Service.

7. Who we share data with

• Google (AdMob and Google Play): under the conditions described in items 5 and 6.
• Authorities, when required by law or court order. (Since the data stays on your device, we normally have nothing to provide.)
• People or apps you choose: when you share a verse as an image, the content goes to the app you chose. Those destinations have their own policies.

We do not sell your data. The only third parties that process data are Google AdMob (ads) and Google Play (purchases), under the conditions described in this Policy.

8. International transfer

Google may process data outside Brazil. In those cases, the safeguards provided for in the LGPD and Google's policies apply.

9. Security and retention

Data stays in the App's private storage on your device, which other apps cannot access without administrator (root) privileges. Note: notes and reading history may contain personal or sensitive information; protect your device with a screen lock. We keep the data on your device until you delete it or uninstall the App. We do not keep a copy on a server of ours.

Android backup: if you have automatic backup enabled on your Google account, the Android system may include the App's data in that backup. This is a setting of your device's system, not of the App. The manual backup as a JSON file stays where you saved it; the App does not delete it, and you are responsible for deleting it.

How to delete:

• One item: notes, highlights and favorites can be deleted inside the App (long press or remove button).
• Everything at once: importing a backup deletes all tables and replaces them with the content of the imported file.
• Uninstalling the App deletes the data in its private storage.
• Ad and purchase data stays with Google and follows its retention policy; manage it at myaccount.google.com.

Changing devices: data does not migrate automatically. Export the backup on the old device and import it on the new one. Premium purchases can be restored through Google Play, with the same account.

10. Your rights

Since we have no copy of the data that stays on the device, you exercise most rights directly in the App. Under the LGPD, you may, upon request: confirm that processing exists; access your data; correct incomplete or outdated data; request anonymization, blocking or deletion; request portability; know who we share your data with; withdraw consent; and review decisions made solely by automated means. Depending on where you live, other laws (such as the GDPR) may grant similar rights, exercised in the same way. To exercise these rights, write to contato@duo.dev.br. You may also file a complaint with the Brazilian National Data Protection Authority (ANPD) or with the data protection authority of your country.

11. Children and teenagers

The App is intended for people aged 18 or over and is not directed at children. Minors should use it only with the authorization and supervision of their parents or legal guardians.

12. Changes to this Policy

We may update this Policy. When a change is relevant, we will notify you through the App or on this page. The date of the last update is at the top.

13. Contact

Duo Dev — contato@duo.dev.br · duo.dev.br