NududuKnow your numbers
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Nududu privacy policy

Effective date: [Effective date]

In short

Nududu keeps your health information on your phone. You do not need an account. We do not have a server that stores your data, and we cannot see your readings, meals, cooking salt, medicines or profile. We do not use ads or tracking tools. Your information only leaves your phone if you choose to send it, for example when you save a backup file or share your clinic report on WhatsApp. Online backup and sharing with a clinic are optional and switched off unless you turn them on. Backups are locked with a code only you have, so we cannot read them.

Who we are

Nududu is made by [Company legal name], [Registered address] ("we", "us").

You can contact us about privacy at:

  • Email: [Contact email]
  • WhatsApp: [WhatsApp support number]

This policy explains what information Nududu uses, where it is kept, and the choices you have. It covers the Nududu website app and the Nududu Android app.

What information Nududu uses

You choose what to enter. Most things are optional. The app can hold:

  • Your profile: name (optional), sex, age, height, activity level, preferred language, your health goal, and whether you have high blood pressure or diabetes, or take no regular medicines.
  • Your readings: blood pressure (morning or evening), blood sugar (and whether it was fasting), and weight. The app works out your BMI from these.
  • Your meals: the foods you ate, the meal, the number of servings, and how many glasses of water you drank.
  • Your cooking salt: what went into the family pot (for example stock cubes, salt, seasoning powder, smoked fish) and how many people shared it.
  • Your medicines: the name, the dose, the times of day you take them, and which doses you ticked as taken.
  • Your reminder settings (Android app only): whether you want blood pressure and medicine reminders, and at what times.

Some of this is health information. The law in many countries treats health information as sensitive and gives it extra protection. We designed Nududu so that this information stays with you.

Where your information is kept

  • Everything you enter is saved only on your device. In the website app it is saved in your browser's storage on that phone or computer. In the Android app it is saved in the app's storage on your phone.
  • There is no Nududu account.
  • Nududu does not send your information to us or to anyone else.
  • We do not have a copy. This means we cannot see it, and we cannot get it back for you if it is lost.
  • Your phone's own backup. Android phones can back up app data to the phone owner's Google account, if the owner has turned on phone backup in the phone settings. This backup may include Nududu's information. It is controlled by you and Google, not by us, and we cannot see it. You can turn phone backup on or off in your phone settings.

What we do not do

  • We do not sell your information.
  • We do not show ads.
  • We do not use analytics or tracking tools inside the app.
  • We do not use your information for marketing.
  • We do not ask for your location, contacts, camera, microphone or photos. The Android app asks to show notifications only if you turn on reminders.

Reminders

The Android app can remind you to check your blood pressure and to take your medicines. Reminders are off until you turn them on. The phone creates them itself; they are not sent from the internet.

  • Reminders do not name your medicines. A medicine reminder only says it is time for your medicines.
  • Depending on your phone settings, reminders can appear on the lock screen, where other people may see them.
  • You can turn reminders off in Nududu, or hide notification details on the lock screen in your phone settings.

When your information leaves your phone

Your information only leaves your phone when you choose to send it.

  • Backup file. When you tap "Save backup", the app makes a file (named like nududu-backup-2026-01-31.json) on your device. This file holds all your Nududu information. It is not locked with a password. Anyone who has the file can read it. Keep it somewhere safe. If you send it to yourself by WhatsApp, email or cloud storage, those services will hold a copy under their own rules.
  • Restore backup. When you tap "Restore backup", the app reads a backup file you pick and replaces what is in the app. The file is read on your phone. It is not sent to us.
  • Clinic report. You can print the report, save it as a PDF, or share it. If you tap "Share on WhatsApp", the app passes a text summary to WhatsApp or another app you pick on your phone. The summary can include your name, age, sex, conditions, medicines, blood pressure, medicine-taking, salt, weight and blood sugar. You decide who receives it. After you share it, the app you used (for example WhatsApp, run by Meta) and the person you send it to will have a copy. Their own privacy rules apply, not ours.

Technical information when you download the app

  • Website app. Like any website, when your phone loads or updates the Nududu website, our hosting provider (Cloudflare) handles the connection. It can see technical details such as your internet (IP) address, the type of browser, and the pages requested, and it may keep short technical logs for security and to keep the service running. These requests do not include the health information you enter in the app. After the first visit, the app can work offline.
  • Android app. The Android app has all its pages built in, so it does not need to load them from the internet.
  • If you install Nududu from Google Play, Google handles the download and may collect information about it under Google's own privacy policy. We may see total numbers of installs and crash reports that Google gives to app developers. These do not include the health information you enter in the app.

Keeping your information safe

  • Your information is as safe as your phone. Use a screen lock (PIN, pattern or fingerprint).
  • If other people use your phone, they may be able to open Nududu and see your information.
  • Keep backup files and shared reports private.
  • If your phone is lost, stolen or reset, your Nududu information may be lost too, unless you saved a backup.

How long information is kept, and how to delete it

Your information stays on your device until you delete it.

  • To delete one item, remove it in the app where it is shown.
  • To delete everything at once, go to Profile → Your data → Delete all my data. This also turns off reminders.
  • To delete everything in the Android app, uninstall the app, or clear the app's storage in your phone settings.
  • To delete everything in the website app, clear the site data for Nududu in your browser settings.
  • Delete any backup files you saved, and any reports you shared, separately. We cannot delete these for you because we do not have them.

Your rights

Data protection laws in Ghana, Nigeria, Kenya, South Africa and other countries give you rights over your personal information. These include the right to know what is held about you, to correct it, to delete it, to get a copy, to object, and to withdraw consent.

Today, Nududu keeps your information only on your device, so you can see, change, copy and delete it yourself at any time in the app and in your phone settings. We do not hold your Nududu information, so we normally cannot show or change it for you.

If you have a question or complaint, contact us first at [Contact email] or [WhatsApp support number]. You can also complain to the data protection authority in your country, for example:

  • Ghana: Data Protection Commission
  • Nigeria: Nigeria Data Protection Commission (NDPC)
  • Kenya: Office of the Data Protection Commissioner (ODPC)
  • South Africa: Information Regulator

Children

Nududu is made for adults aged 18 and over. A young person under 18 should only use Nududu with the help and permission of a parent or guardian. We do not knowingly collect information from children. Because the app does not send information to us, we do not receive any information about children.

Information from you is not checked by us

Nududu calculates totals, averages and targets from what you enter. We do not see or check what you enter. If a reading is typed wrongly, the results will be wrong too.

Optional online backup and sharing with a clinic

These two features are switched off unless you turn them on in Profile. If you never turn them on, everything above applies and nothing is sent to us.

Online backup

  • When you turn it on, the app makes a recovery code on your phone. Your information is locked (encrypted) on your phone with that code before it is sent.
  • We store only the locked copy and the date it was saved. We do not receive your recovery code, so we cannot open your backup, and nobody can restore it without the code.
  • If you lose the code, we cannot get your backup back for you.
  • You can turn backup off at any time with "Turn off and delete online copy". This deletes the online copy straight away. The information on your phone stays.

Sharing with a clinic

  • You can choose to share with a clinic by typing the clinic code it gives you and the name the clinic knows you by. The app asks for your permission first.
  • What the clinic sees, for the last 30 days: your blood pressure readings and averages, your medicines and how often you ticked them as taken, your average salt, your latest weight and BMI, your fasting blood sugar average, and your age, sex and known conditions (high blood pressure, diabetes). The clinic does not see your meals, cooking details or any other information.
  • The app sends an updated summary when your readings change and you have internet.
  • You can stop at any time with "Stop sharing". This deletes your summary from our server straight away, and the clinic can no longer see it. It does not remove anything the clinic already copied into its own records.
  • Clinics log in with a code and password. Each clinic only sees the people who chose to share with it.

Where this is stored and who runs it

  • The online parts run on Cloudflare (Cloudflare Pages and Cloudflare D1 database). Data may be stored outside your country. [Confirm data location and any transfer safeguards required in each launch country.]
  • Information is encrypted when it travels over the internet. Backups are also locked with your recovery code, as described above.
  • We do not sell this information, use it for ads, or share it with anyone else, except where the law forces us to.

Your rights for online data

  • You can delete your online backup and stop sharing yourself, at any time, in the app.
  • You can also ask us to delete online data, or ask what we hold, by contacting [Contact email]. We will answer within the time the law in your country requires.
  • If a security problem affects online data, we will tell you and the data protection authorities as the law requires.
  • [Before switching these features on for the public: register with, or notify, the data protection authorities where the law requires it, and name a person responsible for data protection.]

Changes to this policy

We may update this policy. We will change the effective date at the top, and show a notice in the app if the change is important. We will not start sending your information off your phone without asking you first.

Contact

[Company legal name], [Registered address]

  • Email: [Contact email]
  • WhatsApp: [WhatsApp support number]