SpamBlocker

Android Call/SMS blocker. (Android 10+)

[!NOTE] There are unknown forks on Google play, this one is published under "atvari"

Table of Contents

• Screenshots
• How it works
• Features
• Limitations
• FAQ
• Permissions
• Privacy
• Language Support
• Contribution Wanted
• Some ideas
• Donate

Screenshots

History	Settings	Notification

How it works

It works without replacing your call/SMS app. You can kill the app after setup, it doesn't need to stay running in the background.

📞 For call:

It's a Caller ID app.

💬 For SMS:

The app takes over SMS notifications, you need to disable notifications from the SMS app to avoid duplicates.

App	Send/Receive SMS	Show Notifications	Message Logs	The Point
SpamBlocker	❌	✅️ Takes over notifications	Received messages only, no sent messages	Avoid interruptions
SMS apps	✅️	❌ Must be manually disabled	All messages (remain undeleted, including spam texts)	Messaging

SMS Screening provider mode:

Similar to call screening, the app can work as a service. The SMS app asks it to check messages in real time, this app simply replies "block" or "allow". It only works with SMS apps that support this SMS screening protocol. Currently, this is not supported by any SMS app :)

Features:

Filter	It checks
Contacts	From a contact?
Contact Group	From a contact group?
Contact Prefix	Matches prefix of an existing contact? Use case: save one clinic number xxxx22 to allow its full range xxxx11-xxxx99
STIR/SHAKEN	Fails STIR/SHAKEN attestation?
Repeated Calls	Multiple calls from the same number in a short while?
Dialed Number	Have you dialed the number?
Answered Number	Allow previously answered numbers
Emergency	Allow calls for a while after dialing an emergency number(e.g. 911)
Push Alert	Allow calls after receiving notifications from other apps, e.g.: "Your order has been taken by driver ...", the driver may then contact you.
SMS Alert	Allow calls after receiving SMS messages like: "[From ...] We are calling to inform ..., please feel free to answer."
SMS Bomb	Block continuous OTP message floods
Recent Apps	Allow calls if some apps have been used recently. Use case:   You ordered Pizza online and soon they call you to refund.
Meeting Mode	Decline calls during online video meetings.
Off Time	A time period that always allows calls, usually no spams at night.
Spam Database	Block numbers in the spam database. Any downloadable spam databases can be integrated, such as the FTC-DNC registry.
Local AI Training	Train your own spam SMS filter
Schedule & Calendar	Auto adjust rules based on time schedule and calendar events
Geolocation & Carrier	Block numbers based on geolocation or carrier name
Instant Query	Check the incoming number online in real time, querying multiple API endpoints simultaneously, such as the PhoneBlock.
Report Spam	Automatically or manually report the number to build our crowd-sourced databases, protecting others and yourself.
Regex (regular expression)	Check the Wiki for examples.

Limitations

• Auto clear SMS: No plan
• RCS support: No plan
• Android 9- support: No plan

FAQ

• How the "Priority" works
• Material UI
• It stops working after being killed
• Android 16+ always shows a "missed call" notification for silenced calls

Permissions

Permission (all optional)	Why
INTERNET	For database downloading / instant query / number reporting
ANSWER_PHONE_CALLS	Reject, answer and hang-up calls
POST_NOTIFICATIONS	Show notifications
READ_CONTACTS	Match contacts
RECEIVE_SMS / RECEIVE_MMS	For SMS notification screening
SEND_SMS	For auto replying to blocked contacts
READ_CALL_LOG	For allowing repeated calls
READ_SMS	For training local AI
READ_CALENDAR	For dynamically adjusting rules based on calendar events
PACKAGE_USAGE_STATS	For feature: Recent Apps (check whether an app has been used recently)
READ_PHONE_STATE	For BlockMode: Answer+Hang-up (monitor ringing state)
READ_PHONE_NUMBERS	For displaying phone numbers on SIM picker
REQUEST_IGNORE_BATTERY_OPTIMIZATIONS	For it to keep working after being swiped and killed
NOTIFICATION_ACCESS	For feature: Push Alert (receiving notifications from other apps)
WRITE_SETTINGS	For customizing call ringtone
READ_LOG	For reporting bugs with logcat messages
SYSTEM_ALERT_WINDOW	For the caller ID floating window
SCHEDULE_EXACT_ALARM	For repeating important notifications

Privacy

• For offline features

  No data collection.

• For online features:

  The API server will see your:

  • IP address
  • TLS and TCP fingerprints (which would reveal your Android OS)
  • The reported number(including your country code)

  Nothing else.

• Reproducible apk

• Apk signing signature:

  apksigner verify --print-certs SpamBlocker.apk

  7b1ce727856f3427eab1fadfad6c9730cd4e6ba201661547f009206377dffb58

Language support

Languages are translated using AI, PRs for corrections are welcome.

Contribution Wanted

• Both manual and AI-assisted improvements are welcome.

Some ideas

• A decentralized database

(new ideas are welcome)

Donate 🤑

https://aj3423.github.io/donate