ANTIFRAUD APP
Privacy policy.
Last updated: 5 November 2026
In short
- The app sends nothing to the Internet. It doesn't even have permission to.
- Everything it stores stays only on your phone and deletes itself after 30 days.
- No accounts, no ads and no third-party analytics or tracking tools.
Who we are
InforAlvelos, Estrada Nacional de Alverca, R/C Loja, 6160-303 Oleiros.
For anything about this policy, write to us by email: antifraude@inforalvelos.net
What the app handles and where it stays
When a call comes in, the app assesses it on the phone itself and stores, only in the app's private storage:
- the phone number of the caller (or "hidden number");
- the time, how long the call rang and whether you answered it;
- the risk score and the reasons for the warning;
- your "I trust" and "It's fraud" marks on numbers;
- your settings.
There is no server of ours and no user account. We, InforAlvelos, never have access to this data.
Messages and links you check
If you share or paste an SMS, message or link on the "Check" screen, the text is analysed on the phone and is neither saved nor sent. It disappears when you close the screen.
Warnings on messages (optional, off by default)
If you turn on "Warn about messages", the app starts receiving from Android the notifications of incoming messages, to warn you when one shows signs of a scam. Before you turn it on, the app explains this on a screen of its own and only continues if you tap "Accept and continue"; Android then asks you for "Notification access".
- The app only looks at notifications from the phone's SMS app, Samsung Messages, Google Messages, WhatsApp and WhatsApp Business. Notifications from all other apps are ignored.
- It uses the name or number of the sender and the text the notification shows. It analyses them on the phone itself, when the message arrives, even with the app closed, using the same rules as the "Check" screen, only to detect signs of a scam. They are not used for advertising or to build profiles.
- The text is neither saved nor sent and is forgotten right after the analysis. So as not to warn twice about the same message, the app keeps only a check number (which does not reveal the text), in memory, for a few hours; it disappears if the phone restarts.
- If the message looks like a scam, the app shows a warning of its own. The "See why" button opens the text on the "Check" screen; the text travels inside that warning and disappears with it.
- If "Recognise my contacts" is on, the app checks whether the sender is in your contacts and, if so, only warns about fake links and dangerous requests.
- Android's notice says the app can read "all notifications": this is Android's standard wording and we cannot change it.
- You can turn it off whenever you like: in the app's Settings, "Warn about messages", or in Android's settings, "Notification access".
Contacts (optional)
If you turn on "Recognise my contacts", the app looks at your contact list only to know whether a number is already there and, if so, not treat its calls as suspicious and only warn about messages with fake links or dangerous requests. Contacts are not copied, saved or sent. You can turn the option off whenever you like.
Call back with care (optional, off by default)
If you turn on this option, Android shows the app the number of each call you make, before it goes out. The app compares it, on the phone itself, with the history, your marks and your contacts. If it is an unknown number that recently called and hung up within seconds, or a number you marked as "It's fraud", the call is stopped and the app shows a warning with a "Call anyway" button.
- It never acts on emergency numbers, short numbers, contacts or numbers marked "I trust". If anything fails, the call goes ahead normally.
- The calls you make are neither saved in the history nor sent. If you tap "Call anyway", the number is kept only until the next call and the authorisation lasts 2 minutes.
- This option needs "Recognise my contacts". You can turn it off whenever you like, in the app's Settings.
Permissions and what they are for
| Permission | What it is for |
|---|---|
| Call screening (Android role) | Receive the number of a call when it starts ringing, to assess it. |
| Phone state | Know whether the call was answered or ended unanswered, to measure the ringing. |
| Notifications | Show the warnings ("Don't call back" and suspicious messages). |
| Contacts (optional) | Recognise numbers you already know. |
| Notification access (optional) | Only if you turn on "Warn about messages": read, on the phone, SMS and WhatsApp notifications to warn about scams. Nothing is saved or sent. |
| Call redirection (Android role, optional) | Only if you turn on "Call back with care": see the number of a call before it goes out, to stop risky ones and ask first. |
The app has no SMS permission (it does not open your message inbox or old messages) and does not use the Accessibility service. It only sees new messages through notifications, and only if you turn on "Warn about messages".
Call blocking
By default the app only warns. It only rejects calls if you turn on "Block automatically" and, even then, only very high-risk ones.
Sharing with third parties
We don't share data with anyone, because we don't receive it. The app has no advertising and no third-party analytics tools.
Why the app may handle this data (legal basis)
The app works on your phone because you installed it and gave it the permissions. The data stays with you and we don't receive it. You can withdraw the permissions or delete the app whenever you like, and the app stops working.
Automatic scoring
The app calculates a risk score automatically, on your phone, to warn you. It is only a warning and does not make decisions for you. It only rejects calls if you turn on "Block automatically", and you can always correct the app with "I trust" or "It's fraud".
How long we keep data
The call history deletes itself after 30 days. You can delete it right away in Settings, "Delete all history now". If you uninstall the app, everything it stored disappears.
Your rights
Since the data is only on your phone, you are the one who controls it: you can see it in the History, correct marks, delete it and withdraw permissions at any time in Android's settings. For any question, contact us using the details above. You also have the right to lodge a complaint with the Portuguese data protection authority, the Comissão Nacional de Proteção de Dados (www.cnpd.pt).
Limits of the app
The app warns based on signs (for example, very short rings that repeat) and can be wrong. It cannot see whether a call-back fails, nor detect voices cloned by artificial intelligence. It only sees normal phone calls: those made through apps such as WhatsApp or Meet do not go through Android's filter, so the app does not warn about them. If in doubt, hang up and contact the organisation on the official number you already know.
Changes
If this policy changes, the new version will be published here, with the date updated.